Run C# import cleanup based on the Solution files (#1838)

This is to make the style consistent with the rest of the project as well as removing unused imports.

src/Calculator/App.xaml.cs

@@ -8,6 +8,7 @@
 
 using CalculatorApp.ViewModel.Common;
 using CalculatorApp.ViewModel.Common.Automation;
+
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
@@ -29,7 +30,7 @@ namespace CalculatorApp
 {
     namespace ApplicationResourceKeys
     {
-        static public partial class Globals
+        public static partial class Globals
         {
             public static readonly string AppMinWindowHeight = "AppMinWindowHeight";
             public static readonly string AppMinWindowWidth = "AppMinWindowWidth";
@@ -39,7 +40,7 @@ static public partial class Globals
     /// <summary>
     /// Provides application-specific behavior to supplement the default Application class.
     /// </summary>
-    sealed partial class App
+    public sealed partial class App
     {
         /// <summary>
         /// Initializes the singleton application object. This is the first line of authored code
@@ -124,8 +125,10 @@ internal void RemoveSecondaryWindow(WindowFrameService frameService)
 
         private static Frame CreateFrame()
         {
-            var frame = new Frame();
+            var frame = new Frame
-            frame.FlowDirection = LocalizationService.GetInstance().GetFlowDirection();
+            {
+                FlowDirection = LocalizationService.GetInstance().GetFlowDirection()
+            };
             return frame;
         }
 
@@ -224,8 +227,7 @@ private void OnAppLaunch(IActivatedEventArgs args, string argument)
                         _ = newCoreAppView.Dispatcher.RunAsync(
                             CoreDispatcherPriority.Normal, async () =>
                             {
-                                var that = weak.Target as App;
+                                if (weak.Target is App that)
-                                if (that != null)
                                 {
                                     var newRootFrame = App.CreateFrame();
 
@@ -399,9 +401,9 @@ public void Dispose()
                 Dispose();
             }
 
-            private WindowFrameService m_frameService;
+            private readonly WindowFrameService m_frameService;
             private bool m_frameOpenedInWindow;
-            private App m_parent;
+            private readonly App m_parent;
         };
 
         private async Task SetupJumpList()
@@ -502,7 +504,7 @@ private void RemoveWindowFromMap(int viewId)
         }
 
         private readonly ReaderWriterLockSlim m_windowsMapLock = new ReaderWriterLockSlim();
-        private Dictionary<int, WindowFrameService> m_secondaryWindows = new Dictionary<int, WindowFrameService>();
+        private readonly Dictionary<int, WindowFrameService> m_secondaryWindows = new Dictionary<int, WindowFrameService>();
         private int m_mainViewId;
         private bool m_preLaunched;
     }

src/Calculator/Calculator.csproj

@@ -145,7 +145,6 @@
     <Compile Include="Common\AppLifecycleLogger.cs" />
     <Compile Include="Common\KeyboardShortcutManager.cs" />
     <Compile Include="Common\ValidatingConverters.cs" />
-    <Compile Include="Common\ViewState.cs" />
     <Compile Include="Controls\CalculationResult.cs" />
     <Compile Include="Controls\CalculationResultAutomationPeer.cs" />
     <Compile Include="Controls\CalculatorButton.cs" />

src/Calculator/Common/AlwaysSelectedCollectionView.cs

@@ -4,6 +4,7 @@
 using System;
 using System.Collections;
 using System.Collections.Generic;
+
 using Windows.Foundation;
 using Windows.Foundation.Collections;
 using Windows.UI.Xaml.Data;
@@ -12,15 +13,14 @@ namespace CalculatorApp
 {
     namespace Common
     {
-        sealed class AlwaysSelectedCollectionView : Windows.UI.Xaml.DependencyObject, Windows.UI.Xaml.Data.ICollectionView
+        internal sealed class AlwaysSelectedCollectionView : Windows.UI.Xaml.DependencyObject, Windows.UI.Xaml.Data.ICollectionView
         {
             internal AlwaysSelectedCollectionView(IList source)
             {
-                m_currentPosition = -1;
+                CurrentPosition = -1;
                 m_source = source;
 
-                var observable = source as Windows.UI.Xaml.Interop.IBindableObservableVector;
+                if (source is Windows.UI.Xaml.Interop.IBindableObservableVector observable)
-                if (observable != null)
                 {
                     observable.VectorChanged += OnSourceBindableVectorChanged;
                 }
@@ -33,7 +33,7 @@ public bool MoveCurrentTo(object item)
                     int newCurrentPosition = m_source.IndexOf(item);
                     if (newCurrentPosition != -1)
                     {
-                        m_currentPosition = newCurrentPosition;
+                        CurrentPosition = newCurrentPosition;
                         CurrentChanged?.Invoke(this, null);
                         return true;
                     }
@@ -42,7 +42,7 @@ public bool MoveCurrentTo(object item)
                 // The item is not in the collection
                 // We're going to schedule a call back later so we
                 // restore the selection to the way we wanted it to begin with
-                if (m_currentPosition >= 0 && m_currentPosition < m_source.Count)
+                if (CurrentPosition >= 0 && CurrentPosition < m_source.Count)
                 {
                     Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, new Windows.UI.Core.DispatchedHandler(() =>
                     {
@@ -59,7 +59,7 @@ public bool MoveCurrentToPosition(int index)
                     return false;
                 }
 
-                m_currentPosition = index;
+                CurrentPosition = index;
                 CurrentChanged?.Invoke(this, null);
                 return true;
             }
@@ -132,73 +132,34 @@ public bool Remove(object item)
 
             public object this[int index]
             {
-                get
+                get => m_source[index];
-                {
-                    return m_source[index];
-                }
 
                 set => throw new NotImplementedException();
             }
 
-            public int Count
+            public int Count => m_source.Count;
-            {
-                get
-                {
-                    return m_source.Count;
-                }
-            }
 
-            public IObservableVector<object> CollectionGroups
+            public IObservableVector<object> CollectionGroups => (IObservableVector<object>)new List<object>();
-            {
-                get
-                {
-                    return (IObservableVector<object>)new List<object>();
-                }
-            }
 
             public object CurrentItem
             {
                 get
                 {
-                    if (m_currentPosition >= 0 && m_currentPosition < m_source.Count)
+                    if (CurrentPosition >= 0 && CurrentPosition < m_source.Count)
                     {
-                        return m_source[m_currentPosition];
+                        return m_source[CurrentPosition];
                     }
                     return null;
                 }
             }
 
-            public int CurrentPosition
+            public int CurrentPosition { get; private set; }
-            {
-                get
-                {
-                    return m_currentPosition;
-                }
-            }
 
-            public bool HasMoreItems
+            public bool HasMoreItems => false;
-            {
-                get
-                {
-                    return false;
-                }
-            }
 
-            public bool IsCurrentAfterLast
+            public bool IsCurrentAfterLast => CurrentPosition >= m_source.Count;
-            {
-                get
-                {
-                    return m_currentPosition >= m_source.Count;
-                }
-            }
 
-            public bool IsCurrentBeforeFirst
+            public bool IsCurrentBeforeFirst => CurrentPosition < 0;
-            {
-                get
-                {
-                    return m_currentPosition < 0;
-                }
-            }
 
             public int IndexOf(object item)
             {
@@ -216,7 +177,7 @@ IEnumerator IEnumerable.GetEnumerator()
             }
 
             // Event handlers
-            void OnSourceBindableVectorChanged(Windows.UI.Xaml.Interop.IBindableObservableVector source, object e)
+            private void OnSourceBindableVectorChanged(Windows.UI.Xaml.Interop.IBindableObservableVector source, object e)
             {
                 Windows.Foundation.Collections.IVectorChangedEventArgs args = (Windows.Foundation.Collections.IVectorChangedEventArgs)e;
                 VectorChanged?.Invoke(this, args);
@@ -230,8 +191,7 @@ public event CurrentChangingEventHandler CurrentChanging
                 remove => throw new NotImplementedException();
             }
 
-            IList m_source;
+            private readonly IList m_source;
-            int m_currentPosition;
         }
 
         public sealed class AlwaysSelectedCollectionViewConverter : Windows.UI.Xaml.Data.IValueConverter
@@ -242,8 +202,7 @@ public AlwaysSelectedCollectionViewConverter()
 
             public object Convert(object value, Type targetType, object parameter, string language)
             {
-                var result = value as IList;
+                if (value is IList result)
-                if (result != null)
                 {
                     return new AlwaysSelectedCollectionView(result);
                 }

src/Calculator/Common/AppLifecycleLogger.cs

@@ -1,9 +1,10 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
+// Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
+using CalculatorApp.ViewModel.Common;
+
 using System;
 
-using CalculatorApp.ViewModel.Common;
 using Windows.ApplicationModel;
 using Windows.ApplicationModel.Core;
 using Windows.Foundation.Diagnostics;
@@ -11,7 +12,7 @@
 
 namespace CalculatorApp
 {
-    static public partial class Globals
+    public static class Globals
     {
 #if SEND_DIAGNOSTICS
         // c.f. WINEVENT_KEYWORD_RESERVED_63-56 0xFF00000000000000 // Bits 63-56 - channel keywords
@@ -29,7 +30,7 @@ static public partial class Globals
 #endif
     }
 
-    class AppLifecycleLogger
+    internal class AppLifecycleLogger
     {
         public static AppLifecycleLogger GetInstance()
         {
@@ -145,7 +146,7 @@ private void PopulateAppInfo(LoggingFields fields)
             fields.AddString("PsmKey", psmKey);
         }
 
-        private LoggingChannel m_appLifecycleProvider;
+        private readonly LoggingChannel m_appLifecycleProvider;
         private static readonly Lazy<AppLifecycleLogger> s_selfInstance = new Lazy<AppLifecycleLogger>(() => new AppLifecycleLogger(), true);
     }
 }

src/Calculator/Common/KeyboardShortcutManager.cs

@@ -3,39 +3,39 @@
 
 using CalculatorApp.ViewModel;
 using CalculatorApp.ViewModel.Common;
+
 using System;
 using System.Collections.Generic;
-using System.Collections.ObjectModel;
 using System.Diagnostics;
 using System.Linq;
-using Windows.Foundation.Collections;
+
 using Windows.UI.Core;
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Controls;
 using Windows.UI.Xaml.Controls.Primitives;
+
 using MUXC = Microsoft.UI.Xaml.Controls;
 
 namespace CalculatorApp
 {
     namespace Common
     {
-        static partial class KeyboardShortcutManagerLocals
+        internal static class KeyboardShortcutManagerLocals
         {
             // Lights up all of the buttons in the given range
             // The range is defined by a pair of iterators
-            static public void LightUpButtons(IEnumerable<WeakReference> buttons)
+            public static void LightUpButtons(IEnumerable<WeakReference> buttons)
             {
                 foreach (var button in buttons)
                 {
-                    var btn = button.Target as ButtonBase;
+                    if (button.Target is ButtonBase btn && btn.IsEnabled)
-                    if (btn != null && btn.IsEnabled)
                     {
                         LightUpButton(btn);
                     }
                 }
             }
 
-            static public void LightUpButton(ButtonBase button)
+            public static void LightUpButton(ButtonBase button)
             {
                 // If the button is a toggle button then we don't need
                 // to change the UI of the button
@@ -58,14 +58,12 @@ static public void LightUpButton(ButtonBase button)
                 var buttonWeakReference = new WeakReference(button);
                 timer.Tick += (sender, args) =>
                 {
-                    var btn = buttonWeakReference.Target as ButtonBase;
+                    if (buttonWeakReference.Target is ButtonBase btn)
-                    if (btn != null)
                     {
                         VisualStateManager.GoToState(button, "Normal", true);
                     }
 
-                    var tmr = timerWeakReference.Target as DispatcherTimer;
+                    if (timerWeakReference.Target is DispatcherTimer tmr)
-                    if (tmr != null)
                     {
                         tmr.Stop();
                     }
@@ -77,12 +75,11 @@ static public void LightUpButton(ButtonBase button)
             // and execute its command.
             // NOTE: It is assumed that all buttons associated with a particular
             // key have the same command
-            static public void RunFirstEnabledButtonCommand(IEnumerable<WeakReference> buttons)
+            public static void RunFirstEnabledButtonCommand(IEnumerable<WeakReference> buttons)
             {
                 foreach (var button in buttons)
                 {
-                    var btn = button.Target as ButtonBase;
+                    if (button.Target is ButtonBase btn && btn.IsEnabled)
-                    if (btn != null && btn.IsEnabled)
                     {
                         RunButtonCommand(btn);
                         break;
@@ -90,7 +87,7 @@ static public void RunFirstEnabledButtonCommand(IEnumerable<WeakReference> butto
                 }
             }
 
-            static public void RunButtonCommand(ButtonBase button)
+            public static void RunButtonCommand(ButtonBase button)
             {
                 if (button.IsEnabled)
                 {
@@ -101,15 +98,13 @@ static public void RunButtonCommand(ButtonBase button)
                         command.Execute(parameter);
                     }
 
-                    var radio = (button as RadioButton);
+                    if (button is RadioButton radio)
-                    if (radio != null)
                     {
                         radio.IsChecked = true;
                         return;
                     }
 
-                    var toggle = (button as ToggleButton);
+                    if (button is ToggleButton toggle)
-                    if (toggle != null)
                     {
                         toggle.IsChecked = !(toggle.IsChecked != null && toggle.IsChecked.Value);
                         return;
@@ -585,7 +580,7 @@ private static void OnVirtualKeyControlShiftChordPropertyChanged(DependencyObjec
             private static bool CanNavigateModeByShortcut(MUXC.NavigationView navView, object nvi
                 , ApplicationViewModel vm, ViewMode toMode)
             {
-                if(nvi != null && nvi is NavCategory navCategory)
+                if (nvi != null && nvi is NavCategory navCategory)
                 {
                     return navCategory.IsEnabled
                         && navView.Visibility == Visibility.Visible
@@ -604,10 +599,9 @@ private static void NavigateModeByShortcut(bool controlKeyPressed, bool shiftKey
                     var listItems = EqualRange(lookupMap, (MyVirtualKey)key);
                     foreach (var itemRef in listItems)
                     {
-                        var item = itemRef.Target as MUXC.NavigationView;
+                        if (itemRef.Target is MUXC.NavigationView item)
-                        if (item != null)
                         {
-                            var navView = (MUXC.NavigationView)item;
+                            var navView = item;
 
                             var menuItems = ((List<object>)navView.MenuItemsSource);
                             if (menuItems != null)
@@ -668,7 +662,7 @@ private static void OnKeyDownHandler(CoreWindow sender, KeyEventArgs args)
                 // Handle Ctrl + E for DateCalculator
                 if ((key == Windows.System.VirtualKey.E) && isControlKeyPressed && !isShiftKeyPressed && !isAltKeyPressed)
                 {
-                    NavigateModeByShortcut(isControlKeyPressed, isShiftKeyPressed, false, key, ViewMode.Date);
+                    NavigateModeByShortcut(true, false, false, key, ViewMode.Date);
                     return;
                 }
 
@@ -699,7 +693,7 @@ private static void OnKeyDownHandler(CoreWindow sender, KeyEventArgs args)
                         }
 
                         var buttons = EqualRange(lookupMap, (MyVirtualKey)myVirtualKey);
-                        if (buttons.Count() <= 0)
+                        if (!buttons.Any())
                         {
                             return;
                         }
@@ -754,7 +748,7 @@ private static void OnAcceleratorKeyActivated(CoreDispatcher dispatcher, Acceler
                     }
 
                     bool shiftKeyPressed = (Window.Current.CoreWindow.GetKeyState(Windows.System.VirtualKey.Shift) & CoreVirtualKeyStates.Down) == CoreVirtualKeyStates.Down;
-                    NavigateModeByShortcut(controlKeyPressed, shiftKeyPressed, altPressed, key, null);
+                    NavigateModeByShortcut(false, shiftKeyPressed, true, key, null);
                 }
             }
 
@@ -835,18 +829,18 @@ private static void Insert<Tkey, TValue>(SortedDictionary<Tkey, List<TValue>> de
                 }
             }
 
-            private static SortedDictionary<int, SortedDictionary<char, List<WeakReference>>> s_characterForButtons = new SortedDictionary<int, SortedDictionary<char, List<WeakReference>>>();
+            private static readonly SortedDictionary<int, SortedDictionary<char, List<WeakReference>>> s_characterForButtons = new SortedDictionary<int, SortedDictionary<char, List<WeakReference>>>();
-            private static SortedDictionary<int, SortedDictionary<MyVirtualKey, List<WeakReference>>> s_virtualKey = new SortedDictionary<int, SortedDictionary<MyVirtualKey, List<WeakReference>>>();
+            private static readonly SortedDictionary<int, SortedDictionary<MyVirtualKey, List<WeakReference>>> s_virtualKey = new SortedDictionary<int, SortedDictionary<MyVirtualKey, List<WeakReference>>>();
-            private static SortedDictionary<int, SortedDictionary<MyVirtualKey, List<WeakReference>>> s_VirtualKeyControlChordsForButtons = new SortedDictionary<int, SortedDictionary<MyVirtualKey, List<WeakReference>>>();
+            private static readonly SortedDictionary<int, SortedDictionary<MyVirtualKey, List<WeakReference>>> s_VirtualKeyControlChordsForButtons = new SortedDictionary<int, SortedDictionary<MyVirtualKey, List<WeakReference>>>();
-            private static SortedDictionary<int, SortedDictionary<MyVirtualKey, List<WeakReference>>> s_VirtualKeyShiftChordsForButtons = new SortedDictionary<int, SortedDictionary<MyVirtualKey, List<WeakReference>>>();
+            private static readonly SortedDictionary<int, SortedDictionary<MyVirtualKey, List<WeakReference>>> s_VirtualKeyShiftChordsForButtons = new SortedDictionary<int, SortedDictionary<MyVirtualKey, List<WeakReference>>>();
-            private static SortedDictionary<int, SortedDictionary<MyVirtualKey, List<WeakReference>>> s_VirtualKeyAltChordsForButtons = new SortedDictionary<int, SortedDictionary<MyVirtualKey, List<WeakReference>>>();
+            private static readonly SortedDictionary<int, SortedDictionary<MyVirtualKey, List<WeakReference>>> s_VirtualKeyAltChordsForButtons = new SortedDictionary<int, SortedDictionary<MyVirtualKey, List<WeakReference>>>();
-            private static SortedDictionary<int, SortedDictionary<MyVirtualKey, List<WeakReference>>> s_VirtualKeyControlShiftChordsForButtons = new SortedDictionary<int, SortedDictionary<MyVirtualKey, List<WeakReference>>>();
+            private static readonly SortedDictionary<int, SortedDictionary<MyVirtualKey, List<WeakReference>>> s_VirtualKeyControlShiftChordsForButtons = new SortedDictionary<int, SortedDictionary<MyVirtualKey, List<WeakReference>>>();
 
-            private static SortedDictionary<int, bool> s_IsDropDownOpen = new SortedDictionary<int, bool>();
+            private static readonly SortedDictionary<int, bool> s_IsDropDownOpen = new SortedDictionary<int, bool>();
-            private static SortedDictionary<int, bool> s_ignoreNextEscape = new SortedDictionary<int, bool>();
+            private static readonly SortedDictionary<int, bool> s_ignoreNextEscape = new SortedDictionary<int, bool>();
-            private static SortedDictionary<int, bool> s_keepIgnoringEscape = new SortedDictionary<int, bool>();
+            private static readonly SortedDictionary<int, bool> s_keepIgnoringEscape = new SortedDictionary<int, bool>();
-            private static SortedDictionary<int, bool> s_fHonorShortcuts = new SortedDictionary<int, bool>();
+            private static readonly SortedDictionary<int, bool> s_fHonorShortcuts = new SortedDictionary<int, bool>();
-            private static SortedDictionary<int, bool> s_fDisableShortcuts = new SortedDictionary<int, bool>();
+            private static readonly SortedDictionary<int, bool> s_fDisableShortcuts = new SortedDictionary<int, bool>();
 
             //private static Concurrency.reader_writer_lock s_keyboardShortcutMapLock;
             private static readonly object s_keyboardShortcutMapLockMutex = new object();

src/Calculator/Common/ValidatingConverters.cs

@@ -46,8 +46,7 @@ public object ConvertBack(object value, Type targetType, object parameter, strin
                 // extract that value and ensure it is valid, ie >= 0
                 if (value != null)
                 {
-                    var box = value as Windows.Foundation.IPropertyValue;
+                    if (value is Windows.Foundation.IPropertyValue box && box.Type == Windows.Foundation.PropertyType.Int32)
-                    if (box != null && box.Type == Windows.Foundation.PropertyType.Int32)
                     {
                         int index = box.GetInt32();
                         if (index >= 0)

src/Calculator/Common/ViewState.cs

@@ -1,17 +0,0 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
-// Licensed under the MIT License.
-
-namespace CalculatorApp
-{
-    static class ViewState
-    {
-        public static readonly string Snap = "Snap";
-        public static readonly string DockedView = "DockedView";
-
-        public static bool IsValidViewState(string viewState)
-        {
-            return (viewState == Snap) || (viewState == DockedView);
-        }
-    }
-}
-

src/Calculator/Controls/CalculationResult.cs

@@ -1,27 +1,15 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
-using System;
-using System.Collections.Generic;
-using System.Threading.Tasks;
-using System.Diagnostics;
-using CalculatorApp;
-using CalculatorApp.Controls;
 using CalculatorApp.ViewModel.Common;
 
-using Windows.Devices.Input;
+using System;
-using Windows.Foundation;
+using System.Diagnostics;
-using Windows.Foundation.Collections;
+
 using Windows.UI.Xaml;
-using Windows.UI.Xaml.Controls;
-using Windows.UI.Xaml.Controls.Primitives;
-using Windows.UI.Xaml.Data;
-using Windows.UI.Xaml.Input;
-using Windows.UI.Xaml.Media;
-using Windows.UI.Xaml.Navigation;
-using Windows.UI.Xaml.Automation;
 using Windows.UI.Xaml.Automation.Peers;
-using System.Reflection;
+using Windows.UI.Xaml.Controls;
+using Windows.UI.Xaml.Input;
 
 namespace CalculatorApp
 {
@@ -39,8 +27,8 @@ public CalculationResult()
 
             public double MinFontSize
             {
-                get { return (double)GetValue(MinFontSizeProperty); }
+                get => (double)GetValue(MinFontSizeProperty);
-                set { SetValue(MinFontSizeProperty, value); }
+                set => SetValue(MinFontSizeProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for MinFontSize.  This enables animation, styling, binding, etc...
@@ -53,8 +41,8 @@ public double MinFontSize
 
             public double MaxFontSize
             {
-                get { return (double)GetValue(MaxFontSizeProperty); }
+                get => (double)GetValue(MaxFontSizeProperty);
-                set { SetValue(MaxFontSizeProperty, value); }
+                set => SetValue(MaxFontSizeProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for MaxFontSize.  This enables animation, styling, binding, etc...
@@ -67,8 +55,8 @@ public double MaxFontSize
 
             public Thickness DisplayMargin
             {
-                get { return (Thickness)GetValue(DisplayMarginProperty); }
+                get => (Thickness)GetValue(DisplayMarginProperty);
-                set { SetValue(DisplayMarginProperty, value); }
+                set => SetValue(DisplayMarginProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for DisplayMargin.  This enables animation, styling, binding, etc...
@@ -77,8 +65,8 @@ public Thickness DisplayMargin
 
             public bool IsActive
             {
-                get { return (bool)GetValue(IsActiveProperty); }
+                get => (bool)GetValue(IsActiveProperty);
-                set { SetValue(IsActiveProperty, value); }
+                set => SetValue(IsActiveProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for IsActive.  This enables animation, styling, binding, etc...
@@ -91,8 +79,8 @@ public bool IsActive
 
             public string DisplayValue
             {
-                get { return (string)GetValue(DisplayValueProperty); }
+                get => (string)GetValue(DisplayValueProperty);
-                set { SetValue(DisplayValueProperty, value); }
+                set => SetValue(DisplayValueProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for DisplayValue.  This enables animation, styling, binding, etc...
@@ -105,8 +93,8 @@ public string DisplayValue
 
             public bool IsInError
             {
-                get { return (bool)GetValue(IsInErrorProperty); }
+                get => (bool)GetValue(IsInErrorProperty);
-                set { SetValue(IsInErrorProperty, value); }
+                set => SetValue(IsInErrorProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for IsInError.  This enables animation, styling, binding, etc...
@@ -119,8 +107,8 @@ public bool IsInError
 
             public bool IsOperatorCommand
             {
-                get { return (bool)GetValue(IsOperatorCommandProperty); }
+                get => (bool)GetValue(IsOperatorCommandProperty);
-                set { SetValue(IsOperatorCommandProperty, value); }
+                set => SetValue(IsOperatorCommandProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for IsOperatorCommand.  This enables animation, styling, binding, etc...
@@ -278,7 +266,7 @@ protected override void OnRightTapped(RightTappedRoutedEventArgs e)
             {
                 var requestedElement = e.OriginalSource;
 
-                if (requestedElement.Equals(m_textBlock as object))
+                if (requestedElement.Equals(m_textBlock))
                 {
                     m_textBlock.Focus(FocusState.Programmatic);
                 }
@@ -364,14 +352,7 @@ private void OnTextContainerOnViewChanged(object sender, ScrollViewerViewChanged
 
             private void UpdateVisualState()
             {
-                if (IsActive)
+                VisualStateManager.GoToState(this, IsActive ? "Active" : "Normal", true);
-                {
-                    VisualStateManager.GoToState(this, "Active", true);
-                }
-                else
-                {
-                    VisualStateManager.GoToState(this, "Normal", true);
-                }
             }
 
             private void OnScrollLeftClick(object sender, RoutedEventArgs e)
@@ -387,14 +368,13 @@ private void OnScrollRightClick(object sender, RoutedEventArgs e)
             private void ModifyFontAndMargin(TextBlock textBox, double fontChange)
             {
                 double cur = textBox.FontSize;
-                double newFontSize = 0.0;
                 double scaleFactor = SCALEFACTOR;
                 if (m_textContainer.ActualHeight <= HEIGHTCUTOFF)
                 {
                     scaleFactor = SMALLHEIGHTSCALEFACTOR;
                 }
 
-                newFontSize = Math.Min(Math.Max(cur + fontChange, MinFontSize), MaxFontSize);
+                double newFontSize = Math.Min(Math.Max(cur + fontChange, MinFontSize), MaxFontSize);
                 m_textContainer.Padding = new Thickness(0, 0, 0, scaleFactor * Math.Abs(cur - newFontSize));
                 textBox.FontSize = newFontSize;
             }

src/Calculator/Controls/CalculationResultAutomationPeer.cs

@@ -1,10 +1,6 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
-using System;
-using System.Collections.Generic;
-using System.Threading.Tasks;
-using System.Diagnostics;
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Automation.Peers;
 
@@ -26,12 +22,7 @@ protected override AutomationControlType GetAutomationControlTypeCore()
 
             protected override object GetPatternCore(PatternInterface pattern)
             {
-                if (pattern == PatternInterface.Invoke)
+                return pattern == PatternInterface.Invoke ? this : base.GetPatternCore(pattern);
-                {
-                    return this;
-                }
-
-                return base.GetPatternCore(pattern);
             }
 
             public void Invoke()

src/Calculator/Controls/CalculatorButton.cs

@@ -1,19 +1,12 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
-using System;
-using System.Collections.Generic;
-using System.Threading.Tasks;
-using System.Diagnostics;
-using CalculatorApp;
-using CalculatorApp.Controls;
 using CalculatorApp.ViewModel.Common;
+
 using Windows.System;
 using Windows.UI.Xaml;
-using Windows.UI.Xaml.Input;
 using Windows.UI.Xaml.Data;
-using Windows.Foundation.Collections;
+using Windows.UI.Xaml.Input;
-using Windows.Storage.Pickers;
 
 namespace CalculatorApp
 {
@@ -25,15 +18,17 @@ public CalculatorButton()
             {
                 // Set the default bindings for this button, these can be overwritten by Xaml if needed
                 // These are a replacement for binding in styles
-                Binding commandBinding = new Binding();
+                Binding commandBinding = new Binding
-                commandBinding.Path = new PropertyPath("ButtonPressed");
+                {
+                    Path = new PropertyPath("ButtonPressed")
+                };
                 this.SetBinding(CommandProperty, commandBinding);
             }
 
             public NumbersAndOperatorsEnum ButtonId
             {
-                get { return (NumbersAndOperatorsEnum)GetValue(ButtonIdProperty); }
+                get => (NumbersAndOperatorsEnum)GetValue(ButtonIdProperty);
-                set { SetValue(ButtonIdProperty, value); }
+                set => SetValue(ButtonIdProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for ButtonId.  This enables animation, styling, binding, etc...
@@ -46,8 +41,8 @@ public NumbersAndOperatorsEnum ButtonId
 
             public string AuditoryFeedback
             {
-                get { return (string)GetValue(AuditoryFeedbackProperty); }
+                get => (string)GetValue(AuditoryFeedbackProperty);
-                set { SetValue(AuditoryFeedbackProperty, value); }
+                set => SetValue(AuditoryFeedbackProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for AuditoryFeedback.  This enables animation, styling, binding, etc...
@@ -60,8 +55,8 @@ public string AuditoryFeedback
 
             public Windows.UI.Xaml.Media.Brush HoverBackground
             {
-                get { return (Windows.UI.Xaml.Media.Brush)GetValue(HoverBackgroundProperty); }
+                get => (Windows.UI.Xaml.Media.Brush)GetValue(HoverBackgroundProperty);
-                set { SetValue(HoverBackgroundProperty, value); }
+                set => SetValue(HoverBackgroundProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for HoverBackground.  This enables animation, styling, binding, etc...
@@ -70,8 +65,8 @@ public Windows.UI.Xaml.Media.Brush HoverBackground
 
             public Windows.UI.Xaml.Media.Brush HoverForeground
             {
-                get { return (Windows.UI.Xaml.Media.Brush)GetValue(HoverForegroundProperty); }
+                get => (Windows.UI.Xaml.Media.Brush)GetValue(HoverForegroundProperty);
-                set { SetValue(HoverForegroundProperty, value); }
+                set => SetValue(HoverForegroundProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for HoverForeground.  This enables animation, styling, binding, etc...
@@ -80,8 +75,8 @@ public Windows.UI.Xaml.Media.Brush HoverForeground
 
             public Windows.UI.Xaml.Media.Brush PressBackground
             {
-                get { return (Windows.UI.Xaml.Media.Brush)GetValue(PressBackgroundProperty); }
+                get => (Windows.UI.Xaml.Media.Brush)GetValue(PressBackgroundProperty);
-                set { SetValue(PressBackgroundProperty, value); }
+                set => SetValue(PressBackgroundProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for PressBackground.  This enables animation, styling, binding, etc...
@@ -90,8 +85,8 @@ public Windows.UI.Xaml.Media.Brush PressBackground
 
             public Windows.UI.Xaml.Media.Brush PressForeground
             {
-                get { return (Windows.UI.Xaml.Media.Brush)GetValue(PressForegroundProperty); }
+                get => (Windows.UI.Xaml.Media.Brush)GetValue(PressForegroundProperty);
-                set { SetValue(PressForegroundProperty, value); }
+                set => SetValue(PressForegroundProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for PressForeground.  This enables animation, styling, binding, etc...
@@ -100,8 +95,8 @@ public Windows.UI.Xaml.Media.Brush PressForeground
 
             public Windows.UI.Xaml.Media.Brush DisabledBackground
             {
-                get { return (Windows.UI.Xaml.Media.Brush)GetValue(DisabledBackgroundProperty); }
+                get => (Windows.UI.Xaml.Media.Brush)GetValue(DisabledBackgroundProperty);
-                set { SetValue(DisabledBackgroundProperty, value); }
+                set => SetValue(DisabledBackgroundProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for DisabledBackground.  This enables animation, styling, binding, etc...
@@ -110,8 +105,8 @@ public Windows.UI.Xaml.Media.Brush DisabledBackground
 
             public Windows.UI.Xaml.Media.Brush DisabledForeground
             {
-                get { return (Windows.UI.Xaml.Media.Brush)GetValue(DisabledForegroundProperty); }
+                get => (Windows.UI.Xaml.Media.Brush)GetValue(DisabledForegroundProperty);
-                set { SetValue(DisabledForegroundProperty, value); }
+                set => SetValue(DisabledForegroundProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for DisabledForeground.  This enables animation, styling, binding, etc...

src/Calculator/Controls/EquationTextBox.cs

@@ -2,7 +2,7 @@
 // Licensed under the MIT License.
 
 using CalculatorApp.ViewModel.Common;
-using System;
+
 using Windows.UI.Text;
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Automation;
@@ -22,8 +22,8 @@ public EquationTextBox()
 
             public Windows.UI.Xaml.Media.SolidColorBrush EquationColor
             {
-                get { return (Windows.UI.Xaml.Media.SolidColorBrush)GetValue(EquationColorProperty); }
+                get => (Windows.UI.Xaml.Media.SolidColorBrush)GetValue(EquationColorProperty);
-                set { SetValue(EquationColorProperty, value); }
+                set => SetValue(EquationColorProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for EquationColor.  This enables animation, styling, binding, etc...
@@ -32,8 +32,8 @@ public Windows.UI.Xaml.Media.SolidColorBrush EquationColor
 
             public Windows.UI.Xaml.Media.SolidColorBrush EquationButtonForegroundColor
             {
-                get { return (Windows.UI.Xaml.Media.SolidColorBrush)GetValue(EquationButtonForegroundColorProperty); }
+                get => (Windows.UI.Xaml.Media.SolidColorBrush)GetValue(EquationButtonForegroundColorProperty);
-                set { SetValue(EquationButtonForegroundColorProperty, value); }
+                set => SetValue(EquationButtonForegroundColorProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for EquationButtonForegroundColor.  This enables animation, styling, binding, etc...
@@ -42,8 +42,8 @@ public Windows.UI.Xaml.Media.SolidColorBrush EquationButtonForegroundColor
 
             public Windows.UI.Xaml.Controls.Flyout ColorChooserFlyout
             {
-                get { return (Windows.UI.Xaml.Controls.Flyout)GetValue(ColorChooserFlyoutProperty); }
+                get => (Windows.UI.Xaml.Controls.Flyout)GetValue(ColorChooserFlyoutProperty);
-                set { SetValue(ColorChooserFlyoutProperty, value); }
+                set => SetValue(ColorChooserFlyoutProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for ColorChooserFlyout.  This enables animation, styling, binding, etc...
@@ -52,8 +52,8 @@ public Windows.UI.Xaml.Controls.Flyout ColorChooserFlyout
 
             public string EquationButtonContentIndex
             {
-                get { return (string)GetValue(EquationButtonContentIndexProperty); }
+                get => (string)GetValue(EquationButtonContentIndexProperty);
-                set { SetValue(EquationButtonContentIndexProperty, value); }
+                set => SetValue(EquationButtonContentIndexProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for EquationButtonContentIndex.  This enables animation, styling, binding, etc...
@@ -66,8 +66,8 @@ public string EquationButtonContentIndex
 
             public string MathEquation
             {
-                get { return (string)GetValue(MathEquationProperty); }
+                get => (string)GetValue(MathEquationProperty);
-                set { SetValue(MathEquationProperty, value); }
+                set => SetValue(MathEquationProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for MathEquation.  This enables animation, styling, binding, etc...
@@ -76,8 +76,8 @@ public string MathEquation
 
             public bool HasError
             {
-                get { return (bool)GetValue(HasErrorProperty); }
+                get => (bool)GetValue(HasErrorProperty);
-                set { SetValue(HasErrorProperty, value); }
+                set => SetValue(HasErrorProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for HasError.  This enables animation, styling, binding, etc...
@@ -90,8 +90,8 @@ public bool HasError
 
             public bool IsAddEquationMode
             {
-                get { return (bool)GetValue(IsAddEquationModeProperty); }
+                get => (bool)GetValue(IsAddEquationModeProperty);
-                set { SetValue(IsAddEquationModeProperty, value); }
+                set => SetValue(IsAddEquationModeProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for IsAddEquationMode.  This enables animation, styling, binding, etc...
@@ -104,8 +104,8 @@ public bool IsAddEquationMode
 
             public string ErrorText
             {
-                get { return (string)GetValue(ErrorTextProperty); }
+                get => (string)GetValue(ErrorTextProperty);
-                set { SetValue(ErrorTextProperty, value); }
+                set => SetValue(ErrorTextProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for ErrorText.  This enables animation, styling, binding, etc...
@@ -114,19 +114,15 @@ public string ErrorText
 
             public bool IsEquationLineDisabled
             {
-                get { return (bool)GetValue(IsEquationLineDisabledProperty); }
+                get => (bool)GetValue(IsEquationLineDisabledProperty);
-                set { SetValue(IsEquationLineDisabledProperty, value); }
+                set => SetValue(IsEquationLineDisabledProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for IsEquationLineDisabled.  This enables animation, styling, binding, etc...
             public static readonly DependencyProperty IsEquationLineDisabledProperty =
                 DependencyProperty.Register(nameof(IsEquationLineDisabled), typeof(bool), typeof(EquationTextBox), new PropertyMetadata(default(bool)));
 
-            public bool HasFocus
+            private bool HasFocus { get; set; }
-            {
-                get => m_HasFocus;
-            }
-            private bool m_HasFocus;
 
             public event Windows.UI.Xaml.RoutedEventHandler RemoveButtonClicked;
             public event Windows.UI.Xaml.RoutedEventHandler KeyGraphFeaturesButtonClicked;
@@ -296,18 +292,18 @@ private void OnIsAddEquationModePropertyChanged(bool oldValue, bool newValue)
 
             private void UpdateCommonVisualState()
             {
-                string state = null;
+                string state;
                 bool richEditHasContent = RichEditHasContent();
 
-                if (m_HasFocus && HasError)
+                if (HasFocus && HasError)
                 {
                     state = "FocusedError";
                 }
-                else if (IsAddEquationMode && m_HasFocus && !richEditHasContent)
+                else if (IsAddEquationMode && HasFocus && !richEditHasContent)
                 {
                     state = "AddEquationFocused";
                 }
-                else if (m_HasFocus)
+                else if (HasFocus)
                 {
                     state = "Focused";
                 }
@@ -342,7 +338,7 @@ private void UpdateButtonsVisualState()
             {
                 string state;
 
-                if (m_HasFocus && RichEditHasContent())
+                if (HasFocus && RichEditHasContent())
                 {
                     state = "ButtonVisible";
                 }
@@ -361,16 +357,13 @@ private void UpdateButtonsVisualState()
             private bool RichEditHasContent()
             {
                 string text = null;
-                if (m_richEditBox != null)
+                m_richEditBox?.TextDocument.GetText(Windows.UI.Text.TextGetOptions.NoHidden, out text);
-                {
-                    m_richEditBox.TextDocument.GetText(Windows.UI.Text.TextGetOptions.NoHidden, out text);
-                }
                 return !string.IsNullOrEmpty(text);
             }
 
             private void OnRichEditBoxGotFocus(object sender, RoutedEventArgs e)
             {
-                m_HasFocus = true;
+                HasFocus = true;
                 UpdateCommonVisualState();
                 UpdateButtonsVisualState();
             }
@@ -379,7 +372,7 @@ private void OnRichEditBoxLostFocus(object sender, RoutedEventArgs e)
             {
                 if (!m_richEditBox.ContextFlyout.IsOpen)
                 {
-                    m_HasFocus = false;
+                    HasFocus = false;
                 }
 
                 UpdateCommonVisualState();
@@ -458,10 +451,7 @@ private void OnFunctionButtonClicked(object sender, RoutedEventArgs e)
             private void OnFunctionMenuButtonClicked(object sender, RoutedEventArgs e)
             {
                 // Submit the equation before trying to analyze it if invoked from context menu
-                if (m_richEditBox != null)
+                m_richEditBox?.SubmitEquation(EquationSubmissionSource.FOCUS_LOST);
-                {
-                    m_richEditBox.SubmitEquation(EquationSubmissionSource.FOCUS_LOST);
-                }
 
                 KeyGraphFeaturesButtonClicked?.Invoke(this, new RoutedEventArgs());
             }
@@ -475,7 +465,7 @@ private void OnRichEditMenuOpened(object sender, object args)
 
                 if (m_kgfEquationMenuItem != null)
                 {
-                    m_kgfEquationMenuItem.IsEnabled = m_HasFocus && !HasError && RichEditHasContent();
+                    m_kgfEquationMenuItem.IsEnabled = HasFocus && !HasError && RichEditHasContent();
                 }
 
                 if (m_colorChooserMenuItem != null)
@@ -506,42 +496,27 @@ private void OnRichEditMenuOpened(object sender, object args)
 
             private void OnCutClicked(object sender, RoutedEventArgs e)
             {
-                if (m_richEditBox != null)
+                m_richEditBox?.TextDocument.Selection.Cut();
-                {
-                    m_richEditBox.TextDocument.Selection.Cut();
-                }
             }
 
             private void OnCopyClicked(object sender, RoutedEventArgs e)
             {
-                if (m_richEditBox != null)
+                m_richEditBox?.TextDocument.Selection.Copy();
-                {
-                    m_richEditBox.TextDocument.Selection.Copy();
-                }
             }
 
             private void OnPasteClicked(object sender, RoutedEventArgs e)
             {
-                if (m_richEditBox != null)
+                m_richEditBox?.TextDocument.Selection.Paste(0);
-                {
-                    m_richEditBox.TextDocument.Selection.Paste(0);
-                }
             }
 
             private void OnUndoClicked(object sender, RoutedEventArgs e)
             {
-                if (m_richEditBox != null)
+                m_richEditBox?.TextDocument.Undo();
-                {
-                    m_richEditBox.TextDocument.Undo();
-                }
             }
 
             private void OnSelectAllClicked(object sender, RoutedEventArgs e)
             {
-                if (m_richEditBox != null)
+                m_richEditBox?.TextDocument.Selection.SetRange(0, m_richEditBox.TextDocument.Selection.EndPosition);
-                {
-                    m_richEditBox.TextDocument.Selection.SetRange(0, m_richEditBox.TextDocument.Selection.EndPosition);
-                }
             }
 
             private void OnColorFlyoutOpened(object sender, object e)

src/Calculator/Controls/FlipButtons.cs

@@ -2,6 +2,7 @@
 // Licensed under the MIT License.
 
 using CalculatorApp.ViewModel.Common;
+
 using Windows.System;
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Input;
@@ -14,8 +15,8 @@ public sealed class FlipButtons : Windows.UI.Xaml.Controls.Primitives.ToggleButt
         {
             public NumbersAndOperatorsEnum ButtonId
             {
-                get { return (NumbersAndOperatorsEnum)GetValue(ButtonIdProperty); }
+                get => (NumbersAndOperatorsEnum)GetValue(ButtonIdProperty);
-                set { SetValue(ButtonIdProperty, value); }
+                set => SetValue(ButtonIdProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for ButtonId.  This enables animation, styling, binding, etc...
@@ -24,8 +25,8 @@ public NumbersAndOperatorsEnum ButtonId
 
             public Windows.UI.Xaml.Media.Brush HoverBackground
             {
-                get { return (Windows.UI.Xaml.Media.Brush)GetValue(HoverBackgroundProperty); }
+                get => (Windows.UI.Xaml.Media.Brush)GetValue(HoverBackgroundProperty);
-                set { SetValue(HoverBackgroundProperty, value); }
+                set => SetValue(HoverBackgroundProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for HoverBackground.  This enables animation, styling, binding, etc...
@@ -34,8 +35,8 @@ public Windows.UI.Xaml.Media.Brush HoverBackground
 
             public Windows.UI.Xaml.Media.Brush HoverForeground
             {
-                get { return (Windows.UI.Xaml.Media.Brush)GetValue(HoverForegroundProperty); }
+                get => (Windows.UI.Xaml.Media.Brush)GetValue(HoverForegroundProperty);
-                set { SetValue(HoverForegroundProperty, value); }
+                set => SetValue(HoverForegroundProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for HoverForeground.  This enables animation, styling, binding, etc...
@@ -44,8 +45,8 @@ public Windows.UI.Xaml.Media.Brush HoverForeground
 
             public Windows.UI.Xaml.Media.Brush PressBackground
             {
-                get { return (Windows.UI.Xaml.Media.Brush)GetValue(PressBackgroundProperty); }
+                get => (Windows.UI.Xaml.Media.Brush)GetValue(PressBackgroundProperty);
-                set { SetValue(PressBackgroundProperty, value); }
+                set => SetValue(PressBackgroundProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for PressBackground.  This enables animation, styling, binding, etc...
@@ -54,8 +55,8 @@ public Windows.UI.Xaml.Media.Brush PressBackground
 
             public Windows.UI.Xaml.Media.Brush PressForeground
             {
-                get { return (Windows.UI.Xaml.Media.Brush)GetValue(PressForegroundProperty); }
+                get => (Windows.UI.Xaml.Media.Brush)GetValue(PressForegroundProperty);
-                set { SetValue(PressForegroundProperty, value); }
+                set => SetValue(PressForegroundProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for PressForeground.  This enables animation, styling, binding, etc...

src/Calculator/Controls/HorizontalNoOverflowStackPanel.cs

@@ -7,6 +7,7 @@
 //
 
 using System;
+
 using Windows.Foundation;
 using Windows.UI.Xaml.Automation;
 using Windows.UI.Xaml.Automation.Peers;

src/Calculator/Controls/MathRichEditBox.cs

@@ -3,12 +3,13 @@
 
 using System;
 using System.Runtime.InteropServices;
+
+using Windows.ApplicationModel;
 using Windows.System;
 using Windows.UI.Core;
 using Windows.UI.Text;
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Input;
-using Windows.ApplicationModel;
 
 namespace CalculatorApp
 {
@@ -16,14 +17,14 @@ namespace Controls
     {
         namespace Windows_2004_Prerelease
         {
-            public enum RichEditMathMode : int
+            public enum RichEditMathMode
             {
                 NoMath,
                 MathOnly
             }
 
             [Guid("619c20f2-cb3b-4521-981f-2865b1b93f04")]
-            interface ITextDocument4
+            internal interface ITextDocument4
             {
                 int SetMath(string value);
                 int GetMath(out string value);
@@ -40,44 +41,29 @@ public enum EquationSubmissionSource
 
         public sealed class MathRichEditBoxSubmission
         {
-            public bool HasTextChanged
+            public bool HasTextChanged { get; }
-            {
-                get => m_HasTextChanged;
-            }
 
-            public EquationSubmissionSource Source
+            public EquationSubmissionSource Source { get; }
-            {
-                get => m_Source;
-            }
 
             public MathRichEditBoxSubmission(bool hasTextChanged, EquationSubmissionSource source)
             {
-                m_HasTextChanged = hasTextChanged;
+                HasTextChanged = hasTextChanged;
-                m_Source = source;
+                Source = source;
             }
-            private bool m_HasTextChanged;
+
-            private EquationSubmissionSource m_Source;
         }
 
         public sealed class MathRichEditBoxFormatRequest
         {
-            public string OriginalText
+            public string OriginalText { get; }
-            {
-                get => m_OriginalText;
-            }
 
-            public string FormattedText
+            public string FormattedText { get; set; }
-            {
-                get => m_FormattedText;
-                set => m_FormattedText = value;
-            }
 
             public MathRichEditBoxFormatRequest(string originalText)
             {
-                m_OriginalText = originalText;
+                OriginalText = originalText;
             }
-            private string m_OriginalText;
+
-            private string m_FormattedText;
         }
 
         public sealed class MathRichEditBox : Windows.UI.Xaml.Controls.RichEditBox
@@ -86,14 +72,14 @@ public MathRichEditBox()
             {
                 string packageName = Package.Current.Id.Name;
 
-                if(packageName == "Microsoft.WindowsCalculator.Dev")
+                if (packageName == "Microsoft.WindowsCalculator.Dev")
                 {
                     LimitedAccessFeatures.TryUnlockFeature(
                                 "com.microsoft.windows.richeditmath",
                                 "BeDD/jxKhz/yfVNA11t4uA==", // Microsoft.WindowsCalculator.Dev
                                 "8wekyb3d8bbwe has registered their use of com.microsoft.windows.richeditmath with Microsoft and agrees to the terms of use.");
                 }
-                else if(packageName == "Microsoft.WindowsCalculator")
+                else if (packageName == "Microsoft.WindowsCalculator")
                 {
                     LimitedAccessFeatures.TryUnlockFeature(
                                 "com.microsoft.windows.richeditmath",
@@ -108,8 +94,8 @@ public MathRichEditBox()
 
             public string MathText
             {
-                get { return (string)GetValue(MathTextProperty); }
+                get => (string)GetValue(MathTextProperty);
-                set { SetValue(MathTextProperty, value); }
+                set => SetValue(MathTextProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for MathText.  This enables animation, styling, binding, etc...

src/Calculator/Controls/OperatorPanelButton.cs

@@ -1,19 +1,8 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
-using System;
-using System.Collections.Generic;
-using System.Threading.Tasks;
-using System.Diagnostics;
-
-using Windows.Foundation;
-using Windows.UI.ViewManagement;
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Controls;
-using Windows.UI.Xaml.Media;
-using CalculatorApp;
-using CalculatorApp.Common;
-using CalculatorApp.Controls;
 
 namespace CalculatorApp
 {
@@ -27,8 +16,8 @@ public OperatorPanelButton()
 
             public string Text
             {
-                get { return (string)GetValue(TextProperty); }
+                get => (string)GetValue(TextProperty);
-                set { SetValue(TextProperty, value); }
+                set => SetValue(TextProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for Text.  This enables animation, styling, binding, etc...
@@ -37,8 +26,8 @@ public string Text
 
             public string Glyph
             {
-                get { return (string)GetValue(GlyphProperty); }
+                get => (string)GetValue(GlyphProperty);
-                set { SetValue(GlyphProperty, value); }
+                set => SetValue(GlyphProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for Glyph.  This enables animation, styling, binding, etc...
@@ -47,8 +36,8 @@ public string Glyph
 
             public double GlyphFontSize
             {
-                get { return (double)GetValue(GlyphFontSizeProperty); }
+                get => (double)GetValue(GlyphFontSizeProperty);
-                set { SetValue(GlyphFontSizeProperty, value); }
+                set => SetValue(GlyphFontSizeProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for GlyphFontSize.  This enables animation, styling, binding, etc...
@@ -57,8 +46,8 @@ public double GlyphFontSize
 
             public double ChevronFontSize
             {
-                get { return (double)GetValue(ChevronFontSizeProperty); }
+                get => (double)GetValue(ChevronFontSizeProperty);
-                set { SetValue(ChevronFontSizeProperty, value); }
+                set => SetValue(ChevronFontSizeProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for ChevronFontSize.  This enables animation, styling, binding, etc...
@@ -67,8 +56,8 @@ public double ChevronFontSize
 
             public Flyout FlyoutMenu
             {
-                get { return (Flyout)GetValue(FlyoutMenuProperty); }
+                get => (Flyout)GetValue(FlyoutMenuProperty);
-                set { SetValue(FlyoutMenuProperty, value); }
+                set => SetValue(FlyoutMenuProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for FlyoutMenu.  This enables animation, styling, binding, etc...

src/Calculator/Controls/OperatorPanelListView.cs

@@ -1,18 +1,10 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
-using System;
-using System.Collections.Generic;
-using System.Threading.Tasks;
-using System.Diagnostics;
-using CalculatorApp;
-using CalculatorApp.Controls;
-
-using Windows.Foundation;
 using Windows.Devices.Input;
 using Windows.UI.Xaml;
-using Windows.UI.Xaml.Input;
 using Windows.UI.Xaml.Controls;
+using Windows.UI.Xaml.Input;
 
 namespace CalculatorApp
 {
@@ -151,7 +143,7 @@ private void ScrollRight()
                 m_scrollViewer.ChangeView(offset, null, null);
             }
 
-            private double scrollRatio = 0.7;
+            private readonly double scrollRatio = 0.7;
 
             private bool m_isPointerEntered;
 

src/Calculator/Controls/OverflowTextBlock.cs

@@ -1,33 +1,17 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
-using System;
-using System.Collections.Generic;
-using System.Threading.Tasks;
-using System.Diagnostics;
-using CalculatorApp;
-using CalculatorApp.Common;
-using CalculatorApp.Controls;
-
-using Windows.Foundation;
-using Windows.Foundation.Collections;
-using Windows.Devices.Input;
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Automation;
 using Windows.UI.Xaml.Automation.Peers;
 using Windows.UI.Xaml.Controls;
-using Windows.UI.Xaml.Controls.Primitives;
-using Windows.UI.Xaml.Data;
 using Windows.UI.Xaml.Input;
-using Windows.UI.Xaml.Media;
-using Windows.UI.Xaml.Navigation;
-using Windows.ApplicationModel.Store;
 
 namespace CalculatorApp
 {
     namespace Controls
     {
-        public enum OverflowButtonPlacement : int
+        public enum OverflowButtonPlacement
         {
             InLine,
             Above
@@ -47,8 +31,8 @@ public OverflowTextBlock()
 
             public bool TokensUpdated
             {
-                get { return (bool)GetValue(TokensUpdatedProperty); }
+                get => (bool)GetValue(TokensUpdatedProperty);
-                set { SetValue(TokensUpdatedProperty, value); }
+                set => SetValue(TokensUpdatedProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for TokensUpdated.  This enables animation, styling, binding, etc...
@@ -61,8 +45,8 @@ public bool TokensUpdated
 
             public OverflowButtonPlacement ScrollButtonsPlacement
             {
-                get { return (OverflowButtonPlacement)GetValue(ScrollButtonsPlacementProperty); }
+                get => (OverflowButtonPlacement)GetValue(ScrollButtonsPlacementProperty);
-                set { SetValue(ScrollButtonsPlacementProperty, value); }
+                set => SetValue(ScrollButtonsPlacementProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for ScrollButtonsPlacement.  This enables animation, styling, binding, etc...
@@ -75,8 +59,8 @@ public OverflowButtonPlacement ScrollButtonsPlacement
 
             public bool IsActive
             {
-                get { return (bool)GetValue(IsActiveProperty); }
+                get => (bool)GetValue(IsActiveProperty);
-                set { SetValue(IsActiveProperty, value); }
+                set => SetValue(IsActiveProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for IsActive.  This enables animation, styling, binding, etc...
@@ -85,8 +69,8 @@ public bool IsActive
 
             public Windows.UI.Xaml.Style TextStyle
             {
-                get { return (Style)GetValue(TextStyleProperty); }
+                get => (Style)GetValue(TextStyleProperty);
-                set { SetValue(TextStyleProperty, value); }
+                set => SetValue(TextStyleProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for TextStyle.  This enables animation, styling, binding, etc...
@@ -95,8 +79,8 @@ public Windows.UI.Xaml.Style TextStyle
 
             public double ScrollButtonsWidth
             {
-                get { return (double)GetValue(ScrollButtonsWidthProperty); }
+                get => (double)GetValue(ScrollButtonsWidthProperty);
-                set { SetValue(ScrollButtonsWidthProperty, value); }
+                set => SetValue(ScrollButtonsWidthProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for ScrollButtonsWidth.  This enables animation, styling, binding, etc...
@@ -105,8 +89,8 @@ public double ScrollButtonsWidth
 
             public double ScrollButtonsFontSize
             {
-                get { return (double)GetValue(ScrollButtonsFontSizeProperty); }
+                get => (double)GetValue(ScrollButtonsFontSizeProperty);
-                set { SetValue(ScrollButtonsFontSizeProperty, value); }
+                set => SetValue(ScrollButtonsFontSizeProperty, value);
             }
 
             // Using a DependencyProperty as the backing store for ScrollButtonsFontSize.  This enables animation, styling, binding, etc...
@@ -279,14 +263,7 @@ private void OnViewChanged(object sender, ScrollViewerViewChangedEventArgs args)
 
             private void UpdateVisualState()
             {
-                if (IsActive)
+                VisualStateManager.GoToState(this, IsActive ? "Active" : "Normal", true);
-                {
-                    VisualStateManager.GoToState(this, "Active", true);
-                }
-                else
-                {
-                    VisualStateManager.GoToState(this, "Normal", true);
-                }
             }
 
             private void UpdateAllState()

src/Calculator/Controls/OverflowTextBlockAutomationPeer.cs

@@ -1,12 +1,9 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
-using System;
 using System.Collections.Generic;
-using System.Threading.Tasks;
+
-using System.Diagnostics;
 using Windows.UI.Xaml.Automation.Peers;
-using Windows.Foundation.Collections;
 
 namespace CalculatorApp
 {

src/Calculator/Controls/RadixButton.cs

@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
+// Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
 using CalculatorApp.ViewModel.Common;
@@ -14,7 +14,7 @@ public RadixButton()
 
             internal string GetRawDisplayValue()
             {
-                string radixContent = Content.ToString();
+                string radixContent = Content?.ToString();
                 return LocalizationSettings.GetInstance().RemoveGroupSeparators(radixContent);
             }
         }

src/Calculator/Controls/SupplementaryItemsControl.cs

@@ -1,22 +1,14 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
-using System;
-using System.Collections.Generic;
-using System.Threading.Tasks;
-using System.Diagnostics;
-using CalculatorApp;
-using CalculatorApp.Controls;
 using CalculatorApp.ViewModel;
-using Windows.System;
+
+using System.Collections.Generic;
+
 using Windows.UI.Xaml;
-using Windows.UI.Xaml.Input;
-using Windows.UI.Xaml.Controls;
-using Windows.UI.Xaml.Data;
 using Windows.UI.Xaml.Automation;
 using Windows.UI.Xaml.Automation.Peers;
-
+using Windows.UI.Xaml.Controls;
-using Windows.Foundation.Collections;
 
 namespace CalculatorApp
 {
@@ -37,8 +29,7 @@ protected override void PrepareContainerForItemOverride(DependencyObject element
             {
                 base.PrepareContainerForItemOverride(element, item);
 
-                var supplementaryResult = item as SupplementaryResult;
+                if (item is SupplementaryResult supplementaryResult)
-                if (supplementaryResult != null)
                 {
                     AutomationProperties.SetName(element, supplementaryResult.GetLocalizedAutomationName());
                 }
@@ -57,7 +48,7 @@ protected override AutomationPeer OnCreateAutomationPeer()
             }
         }
 
-        sealed class SupplementaryContentPresenterAP : FrameworkElementAutomationPeer
+        internal sealed class SupplementaryContentPresenterAP : FrameworkElementAutomationPeer
         {
             protected override AutomationControlType GetAutomationControlTypeCore()
             {

src/Calculator/Converters/BooleanNegationConverter.cs

@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
+// Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
 using System;
@@ -15,15 +15,13 @@ public sealed class BooleanNegationConverter : Windows.UI.Xaml.Data.IValueConver
         {
             public object Convert(object value, Type targetType, object parameter, string language)
             {
-                var boxedBool = value as bool?;
+                var boolValue = (value is bool boxedBool && boxedBool);
-                var boolValue = (boxedBool != null && boxedBool.Value);
                 return !boolValue;
             }
 
             public object ConvertBack(object value, Type targetType, object parameter, string language)
             {
-                var boxedBool = (value as bool?);
+                var boolValue = (value is bool boxedBool && boxedBool);
-                var boolValue = (boxedBool != null && boxedBool.Value);
                 return !boolValue;
             }
         }

src/Calculator/Converters/BooleanToVisibilityConverter.cs

@@ -1,7 +1,8 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
+// Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
 using System;
+
 using Windows.UI.Xaml;
 
 namespace CalculatorApp
@@ -21,15 +22,13 @@ public static Windows.UI.Xaml.Visibility Convert(bool visibility)
 
             public object Convert(object value, Type targetType, object parameter, string language)
             {
-                var boxedBool = (value as bool?);
+                var boolValue = (value is bool boxedBool && boxedBool);
-                var boolValue = (boxedBool != null && boxedBool.Value);
                 return BooleanToVisibilityConverter.Convert(boolValue);
             }
 
             public object ConvertBack(object value, Type targetType, object parameter, string language)
             {
-                var visibility = (value as Visibility?);
+                return (value is Visibility visibility && visibility == Visibility.Visible);
-                return (visibility != null && visibility.Value == Visibility.Visible);
             }
         }
 
@@ -41,15 +40,13 @@ public sealed class BooleanToVisibilityNegationConverter : Windows.UI.Xaml.Data.
         {
             public object Convert(object value, Type targetType, object parameter, string language)
             {
-                var boxedBool = (value as bool?);
+                var boolValue = (value is bool boxedBool && boxedBool);
-                var boolValue = (boxedBool != null && boxedBool.Value);
                 return BooleanToVisibilityConverter.Convert(!boolValue);
             }
 
             public object ConvertBack(object value, Type targetType, object parameter, string language)
             {
-                var visibility = (value as Visibility?);
+                return (value is Visibility visibility && visibility != Visibility.Visible);
-                return (visibility != null && visibility.Value != Visibility.Visible);
             }
         }
     }

src/Calculator/Converters/ExpressionItemTemplateSelector.cs

@@ -2,7 +2,9 @@
 // Licensed under the MIT License.
 
 using CalculatorApp.ViewModel.Common;
+
 using System;
+
 using Windows.UI.Xaml;
 
 namespace CalculatorApp
@@ -22,61 +24,24 @@ protected override DataTemplate SelectTemplateCore(object item, DependencyObject
                     switch (type)
                     {
                         case TokenType.Operator:
-                            return m_operatorTemplate;
+                            return OperatorTemplate;
                         case TokenType.Operand:
-                            return m_operandTemplate;
+                            return OperandTemplate;
                         case TokenType.Separator:
-                            return m_separatorTemplate;
+                            return SeparatorTemplate;
                         default:
                             throw new Exception("Invalid token type");
                     }
                 }
 
-                return m_separatorTemplate;
+                return SeparatorTemplate;
             }
 
-            public Windows.UI.Xaml.DataTemplate OperatorTemplate
+            public Windows.UI.Xaml.DataTemplate OperatorTemplate { get; set; }
-            {
-                get
-                {
-                    return m_operatorTemplate;
-                }
 
-                set
+            public Windows.UI.Xaml.DataTemplate OperandTemplate { get; set; }
-                {
-                    m_operatorTemplate = value;
-                }
-            }
 
-            public Windows.UI.Xaml.DataTemplate OperandTemplate
+            public Windows.UI.Xaml.DataTemplate SeparatorTemplate { get; set; }
-            {
-                get
-                {
-                    return m_operandTemplate;
-                }
-
-                set
-                {
-                    m_operandTemplate = value;
-                }
-            }
-
-            public Windows.UI.Xaml.DataTemplate SeparatorTemplate
-            {
-                get
-                {
-                    return m_separatorTemplate;
-                }
-
-                set
-                {
-                    m_separatorTemplate = value;
-                }
-            }
-
-            private Windows.UI.Xaml.DataTemplate m_operatorTemplate;
-            private Windows.UI.Xaml.DataTemplate m_operandTemplate;
-            private Windows.UI.Xaml.DataTemplate m_separatorTemplate;
         }
     }
 }

src/Calculator/Converters/ItemSizeToVisibilityConverter.cs

@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
+// Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
 using System;
@@ -12,8 +12,7 @@ public sealed class ItemSizeToVisibilityConverter : Windows.UI.Xaml.Data.IValueC
         {
             public object Convert(object value, Type targetType, object parameter, string language)
             {
-                var items = (value as int?);
+                var boolValue = (value is int items && (items == 0));
-                var boolValue = (items != null && (items.Value == 0));
                 return BooleanToVisibilityConverter.Convert(boolValue);
             }
 
@@ -27,8 +26,7 @@ public sealed class ItemSizeToVisibilityNegationConverter : Windows.UI.Xaml.Data
         {
             public object Convert(object value, Type targetType, object parameter, string language)
             {
-                var items = (value as int?);
+                var boolValue = (value is int items && (items > 0));
-                var boolValue = (items != null && (items.Value > 0));
                 return BooleanToVisibilityConverter.Convert(boolValue);
             }
 

src/Calculator/Converters/RadixToStringConverter.cs

@@ -2,6 +2,7 @@
 // Licensed under the MIT License.
 
 using CalculatorApp.ViewModel.Common;
+
 using System;
 
 namespace CalculatorApp

src/Calculator/Converters/VisibilityNegationConverter.cs

@@ -1,7 +1,8 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
+// Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
 using System;
+
 using Windows.UI.Xaml;
 
 namespace CalculatorApp
@@ -16,8 +17,7 @@ public sealed class VisibilityNegationConverter : Windows.UI.Xaml.Data.IValueCon
         {
             public object Convert(object value, Type targetType, object parameter, string language)
             {
-                var boxedVisibility = (value as Visibility?);
+                if (value is Visibility boxedVisibility && boxedVisibility == Visibility.Collapsed)
-                if (boxedVisibility != null && boxedVisibility.Value == Visibility.Collapsed)
                 {
                     return Visibility.Visible;
                 }

src/Calculator/Properties/AssemblyInfo.cs

@@ -1,5 +1,4 @@
 using System.Reflection;
-using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 
 // General Information about an assembly is controlled through the following 

src/Calculator/Selectors/NavViewMenuItemTemplateSelector.cs

@@ -2,7 +2,9 @@
 // Licensed under the MIT License.
 
 using CalculatorApp.ViewModel.Common;
+
 using System;
+
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Controls;
 

src/Calculator/Utils/DelegateCommandUtils.cs

@@ -1,12 +1,13 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
-using System;
 using CalculatorApp.ViewModel.Common;
 
+using System;
+
 namespace CalculatorApp.Utils
 {
-    static class DelegateCommandUtils
+    internal static class DelegateCommandUtils
     {
         public static DelegateCommand MakeDelegateCommand<TTarget>(TTarget target, Action<TTarget, object> handler)
             where TTarget : class
@@ -14,8 +15,7 @@ public static DelegateCommand MakeDelegateCommand<TTarget>(TTarget target, Actio
             WeakReference weakTarget = new WeakReference(target);
             return new DelegateCommand(param =>
             {
-                TTarget thatTarget = weakTarget.Target as TTarget;
+                if (weakTarget.Target is TTarget thatTarget)
-                if(null != thatTarget)
                 {
                     handler.Invoke(thatTarget, param);
                 }

src/Calculator/Utils/DispatcherTimerDelayer.cs

@@ -2,6 +2,7 @@
 // Licensed under the MIT License.
 
 using System;
+
 using Windows.UI.Xaml;
 
 namespace CalculatorApp
@@ -12,8 +13,10 @@ public sealed class DispatcherTimerDelayer
 
         public DispatcherTimerDelayer(TimeSpan timeSpan)
         {
-            m_timer = new DispatcherTimer();
+            m_timer = new DispatcherTimer
-            m_timer.Interval = timeSpan;
+            {
+                Interval = timeSpan
+            };
             var interval = m_timer.Interval;
             m_timer.Tick += Timer_Tick;
         }
@@ -40,6 +43,6 @@ private void Timer_Tick(object sender, object e)
             Action?.Invoke(this, null);
         }
 
-        private DispatcherTimer m_timer;
+        private readonly DispatcherTimer m_timer;
     }
 }

src/Calculator/Utils/ThemeHelper.cs

@@ -3,9 +3,8 @@
 
 using System;
 using System.Reflection;
+
 using Windows.Storage;
-using Windows.UI;
-using Windows.UI.ViewManagement;
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Controls;
 
@@ -71,13 +70,13 @@ public struct ThemeChangedCallbackToken
         public static ThemeChangedCallbackToken RegisterAppThemeChangedCallback(DependencyPropertyChangedCallback callback)
         {
             Frame rootFrame = Window.Current.Content as Frame;
-            long token = rootFrame.RegisterPropertyChangedCallback(Frame.RequestedThemeProperty, callback);
+            long token = rootFrame.RegisterPropertyChangedCallback(FrameworkElement.RequestedThemeProperty, callback);
-            return new ThemeChangedCallbackToken{ RootFrame = new WeakReference(rootFrame), Token = token };
+            return new ThemeChangedCallbackToken { RootFrame = new WeakReference(rootFrame), Token = token };
         }
 
         public static void UnregisterAppThemeChangedCallback(ThemeChangedCallbackToken callbackToken)
         {
-            if(callbackToken.RootFrame.IsAlive)
+            if (callbackToken.RootFrame.IsAlive)
             {
                 Frame rootFrame = callbackToken.RootFrame.Target as Frame;
                 rootFrame.UnregisterPropertyChangedCallback(Frame.RequestedThemeProperty, callbackToken.Token);

src/Calculator/Utils/VisualTree.cs

@@ -2,6 +2,7 @@
 // Licensed under the MIT License.
 
 using System;
+
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Media;
 
@@ -14,7 +15,7 @@ namespace Calculator.Utils
     /// <summary>
     /// Defines a collection of extensions methods for UI.
     /// </summary>
-    sealed class VisualTree
+    internal static class VisualTree
     {
         /// <summary>
         /// Find descendant <see cref="Windows.UI.Xaml.FrameworkElement ^"/> control using its name.
@@ -29,14 +30,13 @@ internal static FrameworkElement FindDescendantByName(DependencyObject element,
                 return null;
             }
 
-            var frameworkElement = (element as FrameworkElement);
+            if (element is FrameworkElement frameworkElement && name.Equals(frameworkElement.Name))
-            if (frameworkElement != null && name.Equals(frameworkElement.Name))
             {
                 return frameworkElement;
             }
 
             var childCount = VisualTreeHelper.GetChildrenCount(element);
-            for (int i = 0; i < childCount; i++)
+            for (var i = 0; i < childCount; i++)
             {
                 var result = FindDescendantByName(VisualTreeHelper.GetChild(element, i), name);
                 if (result != null)
@@ -52,7 +52,7 @@ internal static FrameworkElement FindDescendantByName(DependencyObject element,
         /// Find first descendant control of a specified type.
         /// </summary>
         /// <param name="element">Parent element.</param>
-        /// <param name="type">Type of descendant.</param>
+        /// <param name="typeName">Type of descendant.</param>
         /// <returns>Descendant control or null if not found.</returns>
         private static DependencyObject FindDescendant(DependencyObject element, Type typeName)
         {
@@ -98,8 +98,8 @@ private static FrameworkElement FindAscendantByName(DependencyObject element, st
             {
                 return null;
             }
-            var frameworkElement = (parent as FrameworkElement);
+
-            if (frameworkElement != null && name.Equals(frameworkElement.Name))
+            if (parent is FrameworkElement frameworkElement && name.Equals(frameworkElement.Name))
             {
                 return frameworkElement;
             }

src/Calculator/Views/Calculator.xaml.cs

@@ -1,33 +1,21 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
-using System;
-using System.Collections.Generic;
-using System.Threading.Tasks;
-using System.Diagnostics;
-using CalculatorApp;
-using CalculatorApp.Converters;
-using CalculatorApp.Controls;
 using CalculatorApp.Utils;
 using CalculatorApp.ViewModel;
 using CalculatorApp.ViewModel.Common;
 
+using System;
+
 using Windows.Foundation;
-using Windows.Foundation.Collections;
 using Windows.Globalization.NumberFormatting;
-using Windows.System;
 using Windows.UI.Core;
+using Windows.UI.ViewManagement;
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Automation;
-using Windows.UI.Xaml.Automation.Peers;
 using Windows.UI.Xaml.Controls;
 using Windows.UI.Xaml.Controls.Primitives;
-using Windows.UI.Xaml.Data;
 using Windows.UI.Xaml.Input;
-using Windows.UI.Xaml.Media;
-using Windows.UI.Xaml.Navigation;
-using Windows.System.Threading;
-using Windows.UI.ViewManagement;
 
 namespace CalculatorApp
 {
@@ -74,15 +62,12 @@ public Calculator()
             this.SizeChanged += Calculator_SizeChanged;
         }
 
-        public CalculatorApp.ViewModel.StandardCalculatorViewModel Model
+        public CalculatorApp.ViewModel.StandardCalculatorViewModel Model => (StandardCalculatorViewModel)this.DataContext;
-        {
-            get => (StandardCalculatorViewModel)this.DataContext;
-        }
 
         public bool IsStandard
         {
-            get { return (bool)GetValue(IsStandardProperty); }
+            get => (bool)GetValue(IsStandardProperty);
-            set { SetValue(IsStandardProperty, value); }
+            set => SetValue(IsStandardProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for IsStandard.  This enables animation, styling, binding, etc...
@@ -95,8 +80,8 @@ public bool IsStandard
 
         public bool IsScientific
         {
-            get { return (bool)GetValue(IsScientificProperty); }
+            get => (bool)GetValue(IsScientificProperty);
-            set { SetValue(IsScientificProperty, value); }
+            set => SetValue(IsScientificProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for IsScientific.  This enables animation, styling, binding, etc...
@@ -109,8 +94,8 @@ public bool IsScientific
 
         public bool IsProgrammer
         {
-            get { return (bool)GetValue(IsProgrammerProperty); }
+            get => (bool)GetValue(IsProgrammerProperty);
-            set { SetValue(IsProgrammerProperty, value); }
+            set => SetValue(IsProgrammerProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for IsProgrammer.  This enables animation, styling, binding, etc...
@@ -123,8 +108,8 @@ public bool IsProgrammer
 
         public bool IsAlwaysOnTop
         {
-            get { return (bool)GetValue(IsAlwaysOnTopProperty); }
+            get => (bool)GetValue(IsAlwaysOnTopProperty);
-            set { SetValue(IsAlwaysOnTopProperty, value); }
+            set => SetValue(IsAlwaysOnTopProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for IsAlwaysOnTop.  This enables animation, styling, binding, etc...
@@ -152,7 +137,7 @@ public System.Windows.Input.ICommand HistoryButtonPressed
         }
         private System.Windows.Input.ICommand donotuse_HistoryButtonPressed;
 
-        private static UISettings uiSettings = new UISettings();
+        private static readonly UISettings uiSettings = new UISettings();
         public void AnimateCalculator(bool resultAnimate)
         {
             if (uiSettings.AnimationsEnabled)
@@ -174,8 +159,10 @@ public void InitializeHistoryView(CalculatorApp.ViewModel.HistoryViewModel histo
         {
             if (m_historyList == null)
             {
-                m_historyList = new HistoryList();
+                m_historyList = new HistoryList
-                m_historyList.DataContext = historyVM;
+                {
+                    DataContext = historyVM
+                };
                 historyVM.HideHistoryClicked += OnHideHistoryClicked;
                 historyVM.HistoryItemClicked += OnHistoryItemClicked;
             }
@@ -247,11 +234,11 @@ private void OnLoaded(object sender, RoutedEventArgs e)
             // Delay load things later when we get a chance.
             WeakReference weakThis = new WeakReference(this);
             _ = this.Dispatcher.RunAsync(
-                CoreDispatcherPriority.Normal, new DispatchedHandler(() => {
+                CoreDispatcherPriority.Normal, new DispatchedHandler(() =>
+                {
                     if (TraceLogger.GetInstance().IsWindowIdInLog(ApplicationView.GetApplicationViewIdForWindow(CoreWindow.GetForCurrentThread())))
                     {
-                        var refThis = weakThis.Target as Calculator;
+                        if (weakThis.Target is Calculator refThis)
-                        if (refThis != null)
                         {
                             refThis.GetMemory();
                         }
@@ -361,8 +348,7 @@ private void OnContextRequested(UIElement sender, ContextRequestedEventArgs e)
 
             PasteMenuItem.IsEnabled = CopyPasteManager.HasStringToPaste();
 
-            Point point;
+            if (e.TryGetPosition(requestedElement, out Point point))
-            if (e.TryGetPosition(requestedElement, out point))
             {
                 m_displayFlyout.ShowAt(requestedElement, point);
             }
@@ -629,7 +615,7 @@ private void Calculator_SizeChanged(object sender, SizeChangedEventArgs e)
             }
         }
 
-        private Windows.UI.Xaml.Controls.MenuFlyout m_displayFlyout;
+        private readonly Windows.UI.Xaml.Controls.MenuFlyout m_displayFlyout;
         private bool m_doAnimate;
         private bool m_resultAnimate;
         private bool m_isLastAnimatedInScientific;

src/Calculator/Views/CalculatorProgrammerBitFlipPanel.xaml.cs

@@ -8,20 +8,14 @@
 
 // The User Control item template is documented at https://go.microsoft.com/fwlink/?LinkId=234236
 
-using System;
-using System.Collections.Generic;
-using System.Threading.Tasks;
-using System.Diagnostics;
-using CalculatorApp;
 using CalculatorApp.Controls;
 using CalculatorApp.ViewModel;
 using CalculatorApp.ViewModel.Common;
 
+using System.Diagnostics;
+
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Automation;
-using Windows.UI.Xaml.Controls;
-using Windows.UI.Xaml.Data;
-using Windows.UI.Xaml.Input;
 
 
 namespace CalculatorApp
@@ -41,10 +35,7 @@ public bool ShouldEnableBit(BitLength length, int index)
             return index <= GetIndexOfLastBit(length);
         }
 
-        public StandardCalculatorViewModel Model
+        public StandardCalculatorViewModel Model => (StandardCalculatorViewModel)this.DataContext;
-        {
-            get { return (StandardCalculatorViewModel)this.DataContext; }
-        }
 
         private void OnLoaded(object sender, RoutedEventArgs e)
         {
@@ -276,7 +267,7 @@ private int GetIndexOfLastBit(BitLength length)
         }
 
         private static readonly uint s_numBits = 64;
-        private FlipButtons[] m_flipButtons = new FlipButtons[s_numBits];
+        private readonly FlipButtons[] m_flipButtons = new FlipButtons[s_numBits];
         private bool m_updatingCheckedStates;
         private BitLength m_currentValueBitLength;
     }

src/Calculator/Views/CalculatorProgrammerDisplayPanel.xaml.cs

@@ -1,9 +1,11 @@
+using CalculatorApp.Utils;
 using CalculatorApp.ViewModel.Common;
+
 using System.Diagnostics;
 using System.Windows.Input;
+
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Controls;
-using CalculatorApp.Utils;
 
 // The User Control item template is documented at https://go.microsoft.com/fwlink/?LinkId=234236
 
@@ -41,10 +43,7 @@ public ViewModel.StandardCalculatorViewModel Model
 
         public bool IsErrorVisualState
         {
-            get
+            get => m_isErrorVisualState;
-            {
-                return m_isErrorVisualState;
-            }
 
             set
             {

src/Calculator/Views/CalculatorProgrammerOperators.xaml.cs

@@ -1,29 +1,13 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
-using System;
-using System.Collections.Generic;
-using System.Threading.Tasks;
-using System.Diagnostics;
-using CalculatorApp;
 using CalculatorApp.Controls;
 using CalculatorApp.ViewModel;
 using CalculatorApp.ViewModel.Common;
-using Windows.Devices.Input;
 
-using Windows.Foundation;
+using System.Diagnostics;
-using Windows.Foundation.Collections;
+
 using Windows.UI.Xaml;
-using Windows.UI.Xaml.Controls;
-using Windows.UI.Xaml.Controls.Primitives;
-using Windows.UI.Xaml.Data;
-using Windows.UI.Xaml.Input;
-using Windows.UI.Xaml.Media;
-using Windows.UI.Xaml.Navigation;
-using Windows.UI.Xaml.Automation;
-using Windows.UI.Xaml.Automation.Peers;
-using Windows.UI.ViewManagement;
-using Windows.UI.Core;
 
 namespace CalculatorApp
 {
@@ -37,15 +21,12 @@ public CalculatorProgrammerOperators()
             CopyMenuItem.Text = AppResourceProvider.GetInstance().GetResourceString("copyMenuItem");
         }
 
-        public StandardCalculatorViewModel Model
+        public StandardCalculatorViewModel Model => (StandardCalculatorViewModel)this.DataContext;
-        {
-            get { return (StandardCalculatorViewModel)this.DataContext; }
-        }
 
         public Style SymbolButtonStyle
         {
-            get { return (Style)GetValue(SymbolButtonStyleProperty); }
+            get => (Style)GetValue(SymbolButtonStyleProperty);
-            set { SetValue(SymbolButtonStyleProperty, value); }
+            set => SetValue(SymbolButtonStyleProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for SymbolButtonStyle.  This enables animation, styling, binding, etc...

src/Calculator/Views/CalculatorProgrammerRadixOperators.xaml.cs

@@ -1,21 +1,11 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
-using System;
-using System.Collections.Generic;
-using System.Threading.Tasks;
-using System.Diagnostics;
-
-using CalculatorApp;
 using CalculatorApp.ViewModel;
 using CalculatorApp.ViewModel.Common;
 
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Controls;
-using Windows.UI.Xaml.Controls.Primitives;
-using Windows.UI.Xaml.Data;
-using CalculatorApp.Common;
-using Windows.UI.Xaml.Media;
 
 namespace CalculatorApp
 {
@@ -29,17 +19,14 @@ public CalculatorProgrammerRadixOperators()
             LoadResourceStrings();
         }
 
-        public StandardCalculatorViewModel Model
+        public StandardCalculatorViewModel Model => (StandardCalculatorViewModel)this.DataContext;
-        {
-            get { return (StandardCalculatorViewModel)this.DataContext; }
-        }
 
         public bool IsErrorVisualState
         {
             get => m_isErrorVisualState;
             set
             {
-                if(m_isErrorVisualState != value)
+                if (m_isErrorVisualState != value)
                 {
                     m_isErrorVisualState = value;
                     string newState = m_isErrorVisualState ? "ErrorLayout" : "NoErrorLayout";

src/Calculator/Views/CalculatorScientificAngleButtons.xaml.cs

@@ -6,26 +6,11 @@
 // Declaration of the CalculatorScientificAngleButtons class
 //
 
-using System;
-using System.Collections.Generic;
-using System.Threading.Tasks;
-using System.Diagnostics;
-using CalculatorApp;
 using CalculatorApp.Utils;
 using CalculatorApp.ViewModel;
 using CalculatorApp.ViewModel.Common;
 
-using Windows.Foundation;
-using Windows.Foundation.Collections;
 using Windows.UI.Xaml;
-using Windows.UI.Xaml.Controls;
-using Windows.UI.Xaml.Controls.Primitives;
-using Windows.UI.Xaml.Data;
-using Windows.UI.Xaml.Input;
-using Windows.UI.Xaml.Media;
-using Windows.UI.Xaml.Navigation;
-using Windows.UI.ViewManagement;
-using Windows.UI.Core;
 
 namespace CalculatorApp
 {
@@ -38,10 +23,7 @@ public CalculatorScientificAngleButtons()
             InitializeComponent();
         }
 
-        public StandardCalculatorViewModel Model
+        public StandardCalculatorViewModel Model => (StandardCalculatorViewModel)this.DataContext;
-        {
-            get { return (StandardCalculatorViewModel)this.DataContext; }
-        }
 
         public System.Windows.Input.ICommand ButtonPressed
         {
@@ -50,7 +32,7 @@ public System.Windows.Input.ICommand ButtonPressed
                 if (donotuse_ButtonPressed == null)
                 {
                     donotuse_ButtonPressed = DelegateCommandUtils.MakeDelegateCommand(this,
-                        (that, param)=>
+                        (that, param) =>
                         {
                             that.OnAngleButtonPressed(param);
                         });
@@ -65,7 +47,7 @@ public bool IsErrorVisualState
             get => m_isErrorVisualState;
             set
             {
-                if(m_isErrorVisualState != value)
+                if (m_isErrorVisualState != value)
                 {
                     m_isErrorVisualState = value;
                     string newState = m_isErrorVisualState ? "ErrorFlyout" : "NoErrorFlyout";

src/Calculator/Views/CalculatorScientificOperators.xaml.cs

@@ -6,26 +6,11 @@
 // Declaration of the CalculatorScientificOperators class
 //
 
-using System;
-using System.Collections.Generic;
-using System.Threading.Tasks;
-using System.Diagnostics;
-using CalculatorApp;
 using CalculatorApp.Common;
 using CalculatorApp.ViewModel;
 using CalculatorApp.ViewModel.Common;
 
-using Windows.Foundation;
-using Windows.Foundation.Collections;
-using Windows.UI.Core;
-using Windows.UI.ViewManagement;
 using Windows.UI.Xaml;
-using Windows.UI.Xaml.Controls;
-using Windows.UI.Xaml.Controls.Primitives;
-using Windows.UI.Xaml.Data;
-using Windows.UI.Xaml.Input;
-using Windows.UI.Xaml.Media;
-using Windows.UI.Xaml.Navigation;
 
 namespace CalculatorApp
 {
@@ -39,15 +24,12 @@ public CalculatorScientificOperators()
             ExpButton.SetValue(KeyboardShortcutManager.VirtualKeyProperty, MyVirtualKey.E);
         }
 
-        public StandardCalculatorViewModel Model
+        public StandardCalculatorViewModel Model => (StandardCalculatorViewModel)this.DataContext;
-        {
-            get { return (StandardCalculatorViewModel)this.DataContext; }
-        }
 
         public bool IsErrorVisualState
         {
-            get { return (bool)GetValue(IsErrorVisualStateProperty); }
+            get => (bool)GetValue(IsErrorVisualStateProperty);
-            set { SetValue(IsErrorVisualStateProperty, value); }
+            set => SetValue(IsErrorVisualStateProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for IsErrorVisualState.  This enables animation, styling, binding, etc...

src/Calculator/Views/CalculatorStandardOperators.xaml.cs

@@ -6,21 +6,7 @@
 // Declaration of the CalculatorStandardOperators class
 //
 
-using System;
-using System.Collections.Generic;
-using System.Threading.Tasks;
-using System.Diagnostics;
-using CalculatorApp;
-
-using Windows.Foundation;
-using Windows.Foundation.Collections;
 using Windows.UI.Xaml;
-using Windows.UI.Xaml.Controls;
-using Windows.UI.Xaml.Controls.Primitives;
-using Windows.UI.Xaml.Data;
-using Windows.UI.Xaml.Input;
-using Windows.UI.Xaml.Media;
-using Windows.UI.Xaml.Navigation;
 
 namespace CalculatorApp
 {
@@ -35,7 +21,7 @@ public CalculatorStandardOperators()
 
         public bool IsErrorVisualState
         {
-            get { return m_isErrorVisualState; }
+            get => m_isErrorVisualState;
             set
             {
                 if (m_isErrorVisualState != value)

src/Calculator/Views/DateCalculator.xaml.cs

@@ -8,30 +8,17 @@
 
 // The User Control item template is documented at https://go.microsoft.com/fwlink/?LinkId=234236
 
-using System;
-using System.Collections.Generic;
-using System.Threading.Tasks;
-using System.Diagnostics;
-using CalculatorApp;
 using CalculatorApp.ViewModel;
 using CalculatorApp.ViewModel.Common;
 
-using Windows.Foundation;
+using System;
-using Windows.Foundation.Collections;
+
 using Windows.Globalization;
 using Windows.Globalization.DateTimeFormatting;
-using Windows.System.UserProfile;
-using Windows.UI.Core;
-using Windows.UI.ViewManagement;
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Automation;
 using Windows.UI.Xaml.Automation.Peers;
 using Windows.UI.Xaml.Controls;
-using Windows.UI.Xaml.Controls.Primitives;
-using Windows.UI.Xaml.Data;
-using Windows.UI.Xaml.Input;
-using Windows.UI.Xaml.Media;
-using Windows.UI.Xaml.Navigation;
 
 namespace CalculatorApp
 {

src/Calculator/Views/GraphingCalculator/EquationInputArea.xaml.cs

@@ -1,29 +1,28 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
+using Calculator.Utils;
+
+using CalculatorApp.Controls;
+using CalculatorApp.ViewModel;
+using CalculatorApp.ViewModel.Common;
+using CalculatorApp.ViewModel.Common.Automation;
+
+using GraphControl;
+
 using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
-using System.Threading.Tasks;
+
-using System.Diagnostics;
-using CalculatorApp;
-using CalculatorApp.Common;
-using CalculatorApp.ViewModel.Common;
-using CalculatorApp.ViewModel.Common.Automation;
-using GraphControl;
-using CalculatorApp.ViewModel;
-using CalculatorApp.Controls;
-using Windows.Foundation;
 using Windows.System;
 using Windows.UI;
 using Windows.UI.Core;
 using Windows.UI.ViewManagement;
 using Windows.UI.Xaml;
-using Windows.UI.Xaml.Media;
 using Windows.UI.Xaml.Controls;
 using Windows.UI.Xaml.Controls.Primitives;
 using Windows.UI.Xaml.Input;
-using Calculator.Utils;
+using Windows.UI.Xaml.Media;
 
 namespace CalculatorApp
 {
@@ -56,7 +55,7 @@ internal void RaisePropertyChanged(string p)
 
         public Windows.Foundation.Collections.IObservableVector<ViewModel.EquationViewModel> Equations
         {
-            get { return m_Equations; }
+            get => m_Equations;
             set
             {
                 if (m_Equations != value)
@@ -70,7 +69,7 @@ public Windows.Foundation.Collections.IObservableVector<ViewModel.EquationViewMo
 
         public Windows.Foundation.Collections.IObservableVector<ViewModel.VariableViewModel> Variables
         {
-            get { return m_Variables; }
+            get => m_Variables;
             set
             {
                 if (m_Variables != value)
@@ -84,7 +83,7 @@ public Windows.Foundation.Collections.IObservableVector<ViewModel.VariableViewMo
 
         public ObservableCollection<SolidColorBrush> AvailableColors
         {
-            get { return m_AvailableColors; }
+            get => m_AvailableColors;
             set
             {
                 if (m_AvailableColors != value)
@@ -99,7 +98,7 @@ public ObservableCollection<SolidColorBrush> AvailableColors
 
         public bool IsMatchAppTheme
         {
-            get { return m_IsMatchAppTheme; }
+            get => m_IsMatchAppTheme;
             set
             {
                 if (m_IsMatchAppTheme != value)
@@ -156,8 +155,7 @@ public void FocusEquationTextBox(EquationViewModel equation)
                 {
                     return;
                 }
-                var equationTextBox = equationInput as EquationTextBox;
+                if (equationInput is EquationTextBox equationTextBox)
-                if (equationTextBox != null)
                 {
                     equationTextBox.FocusTextBox();
                 }
@@ -225,8 +223,10 @@ private void AddNewEquation()
                 colorIndex = colorAssignmentMapping[colorIndex];
             }
 
-            var eq = new EquationViewModel(new Equation(), ++m_lastFunctionLabelIndex, AvailableColors[colorIndex].Color, colorIndex);
+            var eq = new EquationViewModel(new Equation(), ++m_lastFunctionLabelIndex, AvailableColors[colorIndex].Color, colorIndex)
-            eq.IsLastItemInList = true;
+            {
+                IsLastItemInList = true
+            };
             m_equationToFocus = eq;
             Equations.Add(eq);
         }
@@ -355,9 +355,9 @@ private void OnColorValuesChanged(UISettings sender, object args)
         {
 
             WeakReference weakThis = new WeakReference(this);
-            _ = this.Dispatcher.RunAsync(CoreDispatcherPriority.Normal, new DispatchedHandler(() => {
+            _ = this.Dispatcher.RunAsync(CoreDispatcherPriority.Normal, new DispatchedHandler(() =>
-                    var refThis = weakThis.Target as EquationInputArea;
+            {
-                    if (refThis != null && refThis.m_isHighContrast == refThis.m_accessibilitySettings.HighContrast)
+                if (weakThis.Target is EquationInputArea refThis && refThis.m_isHighContrast == refThis.m_accessibilitySettings.HighContrast)
                 {
                     refThis.ReloadAvailableColors(false, false);
                 }
@@ -416,7 +416,7 @@ private void EquationTextBox_EquationButtonClicked(object sender, RoutedEventArg
             var eq = GetViewModelFromEquationTextBox(sender);
             eq.IsLineEnabled = !eq.IsLineEnabled;
 
-            CalculatorApp.ViewModel.Common.TraceLogger.GetInstance().LogShowHideButtonClicked(eq.IsLineEnabled ? false : true);
+            CalculatorApp.ViewModel.Common.TraceLogger.GetInstance().LogShowHideButtonClicked(!eq.IsLineEnabled);
         }
 
         private void EquationTextBox_Loaded(object sender, RoutedEventArgs e)
@@ -594,7 +594,8 @@ private void Slider_ValueChanged(object sender, RangeBaseValueChangedEventArgs e
             {
                 TimeSpan timeSpan = new TimeSpan(10000000); // 1 tick = 100 nanoseconds, and 10000000 ticks = 1 second.
                 DispatcherTimerDelayer delayer = new DispatcherTimerDelayer(timeSpan);
-                delayer.Action += new EventHandler<object>((object s, object arg) => {
+                delayer.Action += new EventHandler<object>((object s, object arg) =>
+                {
                     CalculatorApp.ViewModel.Common.TraceLogger.GetInstance().LogVariableChanged("Slider", name);
                     variableSliders.Remove(name);
                 });
@@ -641,8 +642,8 @@ private void ToggleVariableArea(VariableViewModel selectedVariableViewModel)
         private const string EquationsPropertyName = "Equations";
         private const string IsMatchAppThemePropertyName = "IsMatchAppTheme";
 
-        private Windows.UI.ViewManagement.AccessibilitySettings m_accessibilitySettings;
+        private readonly Windows.UI.ViewManagement.AccessibilitySettings m_accessibilitySettings;
-        private Windows.UI.ViewManagement.UISettings m_uiSettings;
+        private readonly Windows.UI.ViewManagement.UISettings m_uiSettings;
         private int m_lastLineColorIndex;
         private int m_lastFunctionLabelIndex;
         private bool m_isHighContrast;

src/Calculator/Views/GraphingCalculator/EquationStylePanelControl.xaml.cs

@@ -1,8 +1,9 @@
 using CalculatorApp.ViewModel.Common;
+
 using GraphControl;
-using System;
+
 using System.Collections.Generic;
-using System.Linq;
+
 using Windows.UI;
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Controls;
@@ -18,18 +19,20 @@ public EquationStylePanelControl()
         {
             InitializeComponent();
 
-            var allStyles = new List<EquationLineStyle>();
+            var allStyles = new List<EquationLineStyle>
-            allStyles.Add(EquationLineStyle.Solid);
+            {
-            allStyles.Add(EquationLineStyle.Dash);
+                EquationLineStyle.Solid,
-            allStyles.Add(EquationLineStyle.Dot);
+                EquationLineStyle.Dash,
+                EquationLineStyle.Dot
+            };
 
             StyleChooserBox.ItemsSource = allStyles;
         }
 
         public Windows.UI.Color SelectedColor
         {
-            get { return (Windows.UI.Color)GetValue(SelectedColorProperty); }
+            get => (Windows.UI.Color)GetValue(SelectedColorProperty);
-            set { SetValue(SelectedColorProperty, value); }
+            set => SetValue(SelectedColorProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for SelectedColor.  This enables animation, styling, binding, etc...
@@ -42,8 +45,8 @@ public Windows.UI.Color SelectedColor
 
         public GraphControl.EquationLineStyle SelectedStyle
         {
-            get { return (GraphControl.EquationLineStyle)GetValue(SelectedStyleProperty); }
+            get => (GraphControl.EquationLineStyle)GetValue(SelectedStyleProperty);
-            set { SetValue(SelectedStyleProperty, value); }
+            set => SetValue(SelectedStyleProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for SelectedStyle.  This enables animation, styling, binding, etc...
@@ -56,8 +59,8 @@ public GraphControl.EquationLineStyle SelectedStyle
 
         public int SelectedColorIndex
         {
-            get { return (int)GetValue(SelectedColorIndexProperty); }
+            get => (int)GetValue(SelectedColorIndexProperty);
-            set { SetValue(SelectedColorIndexProperty, value); }
+            set => SetValue(SelectedColorIndexProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for SelectedColorIndex.  This enables animation, styling, binding, etc...
@@ -66,8 +69,8 @@ public int SelectedColorIndex
 
         public IList<Windows.UI.Xaml.Media.SolidColorBrush> AvailableColors
         {
-            get { return (IList<Windows.UI.Xaml.Media.SolidColorBrush>)GetValue(AvailableColorsProperty); }
+            get => (IList<Windows.UI.Xaml.Media.SolidColorBrush>)GetValue(AvailableColorsProperty);
-            set { SetValue(AvailableColorsProperty, value); }
+            set => SetValue(AvailableColorsProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for AvailableColors.  This enables animation, styling, binding, etc...
@@ -76,8 +79,8 @@ public IList<Windows.UI.Xaml.Media.SolidColorBrush> AvailableColors
 
         public bool EnableLineStylePicker
         {
-            get { return (bool)GetValue(EnableLineStylePickerProperty); }
+            get => (bool)GetValue(EnableLineStylePickerProperty);
-            set { SetValue(EnableLineStylePickerProperty, value); }
+            set => SetValue(EnableLineStylePickerProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for EnableLineStylePicker.  This enables animation, styling, binding, etc...

src/Calculator/Views/GraphingCalculator/GraphingCalculator.xaml.cs

@@ -1,38 +1,30 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
-using System;
-using System.Collections.Generic;
-using System.Threading.Tasks;
-using System.Diagnostics;
-using CalculatorApp;
 using CalculatorApp.Common;
-using CalculatorApp.ViewModel.Common;
-using CalculatorApp.ViewModel.Common.Automation;
 using CalculatorApp.Controls;
 using CalculatorApp.Utils;
 using CalculatorApp.ViewModel;
+using CalculatorApp.ViewModel.Common;
+using CalculatorApp.ViewModel.Common.Automation;
+
 using GraphControl;
+
+using System;
+
 using Windows.ApplicationModel.DataTransfer;
 using Windows.ApplicationModel.Resources;
 using Windows.Foundation;
 using Windows.Foundation.Collections;
 using Windows.Storage;
-using Windows.Storage.Streams;
 using Windows.System;
 using Windows.UI.Core;
-using Windows.UI.Input;
 using Windows.UI.ViewManagement;
 using Windows.UI.Xaml;
-using Windows.UI.Xaml.Automation;
 using Windows.UI.Xaml.Automation.Peers;
-using Windows.UI.Xaml.Data;
 using Windows.UI.Xaml.Controls;
 using Windows.UI.Xaml.Controls.Primitives;
 using Windows.UI.Xaml.Input;
-using Windows.UI.Xaml.Media;
-using Windows.UI.Xaml.Media.Imaging;
-using Windows.UI.Popups;
 
 namespace CalculatorApp
 {
@@ -62,14 +54,18 @@ public GraphingCalculator()
             GraphingControl.UseCommaDecimalSeperator = LocalizationSettings.GetInstance().GetDecimalSeparator() == ',';
 
             // OemMinus and OemAdd aren't declared in the VirtualKey enum, we can't add this accelerator XAML-side
-            var virtualKey = new KeyboardAccelerator();
+            var virtualKey = new KeyboardAccelerator
-            virtualKey.Key = (VirtualKey)189; // OemPlus key
+            {
-            virtualKey.Modifiers = VirtualKeyModifiers.Control;
+                Key = (VirtualKey)189, // OemPlus key
+                Modifiers = VirtualKeyModifiers.Control
+            };
             ZoomOutButton.KeyboardAccelerators.Add(virtualKey);
 
-            virtualKey = new KeyboardAccelerator();
+            virtualKey = new KeyboardAccelerator
-            virtualKey.Key = (VirtualKey)187; // OemAdd key
+            {
-            virtualKey.Modifiers = VirtualKeyModifiers.Control;
+                Key = (VirtualKey)187, // OemAdd key
+                Modifiers = VirtualKeyModifiers.Control
+            };
             ZoomInButton.KeyboardAccelerators.Add(virtualKey);
 
             if (Windows.Foundation.Metadata.ApiInformation.IsTypePresent("Windows.UI.Xaml.Media.ThemeShadow"))
@@ -144,7 +140,7 @@ public System.Windows.Input.ICommand ZoomInButtonPressed
 
         public bool IsKeyGraphFeaturesVisible
         {
-            get { return m_IsKeyGraphFeaturesVisible; }
+            get => m_IsKeyGraphFeaturesVisible;
             private set
             {
                 if (m_IsKeyGraphFeaturesVisible != value)
@@ -158,8 +154,8 @@ private set
 
         public bool IsSmallState
         {
-            get { return (bool)GetValue(IsSmallStateProperty); }
+            get => (bool)GetValue(IsSmallStateProperty);
-            set { SetValue(IsSmallStateProperty, value); }
+            set => SetValue(IsSmallStateProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for IsSmallState.  This enables animation, styling, binding, etc...
@@ -168,8 +164,8 @@ public bool IsSmallState
 
         public string GraphControlAutomationName
         {
-            get { return (string)GetValue(GraphControlAutomationNameProperty); }
+            get => (string)GetValue(GraphControlAutomationNameProperty);
-            set { SetValue(GraphControlAutomationNameProperty, value); }
+            set => SetValue(GraphControlAutomationNameProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for GraphControlAutomationName.  This enables animation, styling, binding, etc...
@@ -178,7 +174,7 @@ public string GraphControlAutomationName
 
         public bool IsMatchAppTheme
         {
-            get { return m_IsMatchAppTheme; }
+            get => m_IsMatchAppTheme;
             private set
             {
                 if (m_IsMatchAppTheme != value)
@@ -192,7 +188,7 @@ private set
 
         public bool IsManualAdjustment
         {
-            get { return m_IsManualAdjustment; }
+            get => m_IsManualAdjustment;
             set
             {
                 if (m_IsManualAdjustment != value)
@@ -206,7 +202,7 @@ public bool IsManualAdjustment
 
         public CalculatorApp.ViewModel.GraphingCalculatorViewModel ViewModel
         {
-            get { return m_viewModel; }
+            get => m_viewModel;
             set
             {
                 if (m_viewModel != value)
@@ -239,7 +235,7 @@ public static Windows.UI.Xaml.Visibility ManageEditVariablesButtonVisibility(uin
             return numberOfVariables == 0 ? Visibility.Collapsed : Visibility.Visible;
         }
 
-        public static String GetTracingLegend(bool? isTracing)
+        public static string GetTracingLegend(bool? isTracing)
         {
             var resProvider = AppResourceProvider.GetInstance();
             return isTracing != null && isTracing.Value ? resProvider.GetResourceString("disableTracingButtonToolTip")
@@ -374,8 +370,7 @@ private void OnShowTracePopupChanged(bool newValue)
 
         private void OnTracePointChanged(double xPointValue, double yPointValue)
         {
-            double xAxisMin, xAxisMax, yAxisMin, yAxisMax;
+            GraphingControl.GetDisplayRanges(out double xAxisMin, out double xAxisMax, out double yAxisMin, out double yAxisMax);
-            GraphingControl.GetDisplayRanges(out xAxisMin, out xAxisMax, out yAxisMin, out yAxisMax);
 
             TraceValue.Text = "(" + xPointValue.ToString("R") + ", " + yPointValue.ToString("N15") + ")";
 
@@ -523,8 +518,7 @@ private void GraphingControl_LostFocus(object sender, RoutedEventArgs e)
 
         private void GraphingControl_LosingFocus(UIElement sender, LosingFocusEventArgs args)
         {
-            var newFocusElement = args.NewFocusedElement as FrameworkElement;
+            if (!(args.NewFocusedElement is FrameworkElement newFocusElement) || newFocusElement.Name == null)
-            if (newFocusElement == null || newFocusElement.Name == null)
             {
                 // Because clicking on the swap chain panel will try to move focus to a control that can't actually take focus
                 // we will get a null destination.  So we are going to try and cancel that request.
@@ -676,7 +670,7 @@ private void GraphSettingsButton_Click(object sender, RoutedEventArgs e)
         private void SwitchModeToggleButton_Toggled(object sender, RoutedEventArgs e)
         {
             var narratorNotifier = new NarratorNotifier();
-            String announcementText;
+            string announcementText;
             if (SwitchModeToggleButton.IsOn)
             {
                 announcementText = AppResourceProvider.GetInstance().GetResourceString("GraphSwitchedToEquationModeAnnouncement");
@@ -700,15 +694,19 @@ private void DisplayGraphSettings()
 
             if (m_graphFlyout == null)
             {
-                m_graphFlyout = new Flyout();
+                m_graphFlyout = new Flyout
-                m_graphFlyout.Content = m_graphSettings;
+                {
+                    Content = m_graphSettings
+                };
             }
 
             m_graphSettings.SetGrapher(this.GraphingControl);
             m_graphSettings.IsMatchAppTheme = IsMatchAppTheme;
 
-            var options = new FlyoutShowOptions();
+            var options = new FlyoutShowOptions
-            options.Placement = FlyoutPlacementMode.BottomEdgeAlignedRight;
+            {
+                Placement = FlyoutPlacementMode.BottomEdgeAlignedRight
+            };
             m_graphFlyout.ShowAt(GraphSettingsButton, options);
         }
 
@@ -730,7 +728,6 @@ private void AddTracePointerShadow()
         private void UpdateGraphAutomationName()
         {
             int numEquations = 0;
-            double xAxisMin, xAxisMax, yAxisMin, yAxisMax;
 
             // Only count equations that are graphed
             foreach (var equation in ViewModel.Equations)
@@ -741,7 +738,7 @@ private void UpdateGraphAutomationName()
                 }
             }
 
-            GraphingControl.GetDisplayRanges(out xAxisMin, out xAxisMax, out yAxisMin, out yAxisMax);
+            GraphingControl.GetDisplayRanges(out double xAxisMin, out double xAxisMax, out double yAxisMin, out double yAxisMax);
 
             GraphControlAutomationName = LocalizationStringUtil.GetLocalizedString(
                 AppResourceProvider.GetInstance().GetResourceString("graphAutomationName"),
@@ -755,9 +752,9 @@ private void UpdateGraphAutomationName()
         private void OnColorValuesChanged(UISettings sender, object args)
         {
             WeakReference weakThis = new WeakReference(this);
-            _ = this.Dispatcher.RunAsync(CoreDispatcherPriority.Normal, new DispatchedHandler(() => {
+            _ = this.Dispatcher.RunAsync(CoreDispatcherPriority.Normal, new DispatchedHandler(() =>
-                GraphingCalculator refThis = weakThis.Target as GraphingCalculator;
+            {
-                if (refThis != null && IsMatchAppTheme)
+                if (weakThis.Target is GraphingCalculator refThis && IsMatchAppTheme)
                 {
                     refThis.UpdateGraphTheme();
                 }
@@ -793,8 +790,7 @@ private void OnGraphThemeSettingChanged(object sender, bool isMatchAppTheme)
             WeakReference weakThis = new WeakReference(this);
             _ = this.Dispatcher.RunAsync(CoreDispatcherPriority.Normal, new DispatchedHandler(() =>
             {
-                var refThis = weakThis.Target as GraphingCalculator;
+                if (weakThis.Target is GraphingCalculator refThis)
-                if (refThis != null)
                 {
                     refThis.UpdateGraphTheme();
                 }
@@ -807,9 +803,9 @@ private void OnGraphThemeSettingChanged(object sender, bool isMatchAppTheme)
         private const string sc_IsGraphThemeMatchApp = "IsGraphThemeMatchApp";
 
         private CalculatorApp.ViewModel.GraphingCalculatorViewModel m_viewModel;
-        private Windows.UI.ViewManagement.AccessibilitySettings m_accessibilitySettings;
+        private readonly Windows.UI.ViewManagement.AccessibilitySettings m_accessibilitySettings;
         private bool m_cursorShadowInitialized;
-        private Windows.UI.ViewManagement.UISettings m_uiSettings;
+        private readonly Windows.UI.ViewManagement.UISettings m_uiSettings;
         private Windows.UI.Xaml.Controls.Flyout m_graphFlyout;
         private CalculatorApp.GraphingSettings m_graphSettings;
 
@@ -843,8 +839,10 @@ private void OnEquationFormatRequested(object sender, MathRichEditBoxFormatReque
 
         private void GraphMenuFlyoutItem_Click(object sender, RoutedEventArgs e)
         {
-            var dataPackage = new DataPackage();
+            var dataPackage = new DataPackage
-            dataPackage.RequestedOperation = DataPackageOperation.Copy;
+            {
+                RequestedOperation = DataPackageOperation.Copy
+            };
 
             var bitmapStream = GraphingControl.GetGraphBitmapStream();
             dataPackage.SetBitmap(bitmapStream);
@@ -882,9 +880,11 @@ private void ShowShareError()
         {
             // Something went wrong, notify the user.
             var resourceLoader = ResourceLoader.GetForCurrentView();
-            var errDialog = new ContentDialog();
+            var errDialog = new ContentDialog
-            errDialog.Content = resourceLoader.GetString("ShareActionErrorMessage");
+            {
-            errDialog.CloseButtonText = resourceLoader.GetString("ShareActionErrorOk");
+                Content = resourceLoader.GetString("ShareActionErrorMessage"),
+                CloseButtonText = resourceLoader.GetString("ShareActionErrorOk")
+            };
             _ = errDialog.ShowAsync();
         }
 

src/Calculator/Views/GraphingCalculator/GraphingNumPad.xaml.cs

@@ -1,22 +1,15 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
-using System;
-using System.Collections.Generic;
-using System.Threading.Tasks;
-using System.Diagnostics;
-using CalculatorApp;
 using CalculatorApp.ViewModel.Common;
 
-using Windows.Foundation;
+using System;
-using Windows.Foundation.Collections;
+using System.Collections.Generic;
+
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Controls;
 using Windows.UI.Xaml.Controls.Primitives;
-using Windows.UI.Xaml.Data;
 using Windows.UI.Xaml.Input;
-using Windows.UI.Xaml.Media;
-using Windows.UI.Xaml.Navigation;
 
 namespace CalculatorApp
 {
@@ -152,8 +145,7 @@ private void ClearButton_Clicked(object sender, RoutedEventArgs e)
             var mathRichEdit = GetActiveRichEdit();
             if (mathRichEdit != null)
             {
-                string text;
+                mathRichEdit.TextDocument.GetText(Windows.UI.Text.TextGetOptions.NoHidden, out string text);
-                mathRichEdit.TextDocument.GetText(Windows.UI.Text.TextGetOptions.NoHidden, out text);
 
                 if (!string.IsNullOrEmpty(text))
                 {
@@ -189,8 +181,7 @@ private CalculatorApp.Controls.MathRichEditBox GetActiveRichEdit()
         // Adding event because the ShowMode property is ignored in xaml.
         private void Flyout_Opening(object sender, object e)
         {
-            var flyout = sender as Flyout;
+            if (sender is Flyout flyout)
-            if (flyout != null)
             {
                 flyout.ShowMode = FlyoutShowMode.Transient;
             }
@@ -269,8 +260,7 @@ private void Flyout_Opening(object sender, object e)
 
         private static Tuple<string, int, int> GetButtonOutput(NumbersAndOperatorsEnum id)
         {
-            Tuple<string, int, int> output;
+            if (buttonOutput.TryGetValue(id, out Tuple<string, int, int> output))
-            if (buttonOutput.TryGetValue(id, out output))
             {
                 return output;
             }

src/Calculator/Views/GraphingCalculator/GraphingSettings.xaml.cs

@@ -3,28 +3,15 @@
 // Declaration of the MyUserControl class
 //
 
-using System;
-using System.Collections.Generic;
-using System.Threading.Tasks;
-using System.Diagnostics;
 
 //using Graphing;
-using GraphControl;
-using CalculatorApp;
 using CalculatorApp.ViewModel;
 using CalculatorApp.ViewModel.Common;
 
-using Windows.Foundation;
-using Windows.Foundation.Collections;
 using Windows.Storage;
 using Windows.System;
 using Windows.UI.Xaml;
-using Windows.UI.Xaml.Controls;
-using Windows.UI.Xaml.Controls.Primitives;
-using Windows.UI.Xaml.Data;
 using Windows.UI.Xaml.Input;
-using Windows.UI.Xaml.Media;
-using Windows.UI.Xaml.Navigation;
 
 namespace CalculatorApp
 {
@@ -33,20 +20,16 @@ public sealed partial class GraphingSettings
     {
         public GraphingSettings()
         {
-            m_ViewModel = new GraphingSettingsViewModel();
+            ViewModel = new GraphingSettingsViewModel();
             m_IsMatchAppTheme = false;
             InitializeComponent();
         }
 
-        public CalculatorApp.ViewModel.GraphingSettingsViewModel ViewModel
+        public CalculatorApp.ViewModel.GraphingSettingsViewModel ViewModel { get; set; }
-        {
-            get { return m_ViewModel; }
-            set { m_ViewModel = value; }
-        }
 
         public bool IsMatchAppTheme
         {
-            get { return m_IsMatchAppTheme; }
+            get => m_IsMatchAppTheme;
             set
             {
                 if (m_IsMatchAppTheme == value)
@@ -73,7 +56,7 @@ public Style SelectTextBoxStyle(bool incorrectRange, bool error)
 
         public void SetGrapher(GraphControl.Grapher grapher)
         {
-            m_ViewModel.SetGrapher(grapher);
+            ViewModel.SetGrapher(grapher);
         }
 
         public void RefreshRanges()
@@ -133,6 +116,5 @@ private void SetGraphTheme(bool isMatchAppTheme)
         }
 
         private bool m_IsMatchAppTheme;
-        private CalculatorApp.ViewModel.GraphingSettingsViewModel m_ViewModel;
     };
 }

src/Calculator/Views/GraphingCalculator/KeyGraphFeaturesPanel.xaml.cs

@@ -1,18 +1,10 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
-using System;
-using System.Collections.Generic;
-using System.Threading.Tasks;
-using System.Diagnostics;
-using CalculatorApp;
-using CalculatorApp.ViewModel;
-
-using Windows.UI;
-using Windows.UI.Xaml;
-using Windows.UI.Xaml.Controls;
 using System.ComponentModel;
 
+using Windows.UI.Xaml;
+
 namespace CalculatorApp
 {
     public sealed partial class KeyGraphFeaturesPanel : System.ComponentModel.INotifyPropertyChanged
@@ -33,7 +25,7 @@ internal void RaisePropertyChanged(string p)
 
         public CalculatorApp.ViewModel.EquationViewModel ViewModel
         {
-            get { return m_viewModel; }
+            get => m_viewModel;
             set
             {
                 if (m_viewModel != value)

src/Calculator/Views/HistoryList.xaml.cs

@@ -1,8 +1,9 @@
 using CalculatorApp.ViewModel;
 using CalculatorApp.ViewModel.Common;
-using System;
+
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Controls;
+
 using MUXC = Microsoft.UI.Xaml.Controls;
 
 // The User Control item template is documented at https://go.microsoft.com/fwlink/?LinkId=234236
@@ -19,10 +20,7 @@ public HistoryList()
             HistoryEmpty.FlowDirection = LocalizationService.GetInstance().GetFlowDirection();
         }
 
-        public CalculatorApp.ViewModel.HistoryViewModel Model
+        public CalculatorApp.ViewModel.HistoryViewModel Model => (CalculatorApp.ViewModel.HistoryViewModel)DataContext;
-        {
-            get => (CalculatorApp.ViewModel.HistoryViewModel)DataContext;
-        }
 
         public void ScrollToBottom()
         {
@@ -35,8 +33,8 @@ public void ScrollToBottom()
 
         public Windows.UI.Xaml.GridLength RowHeight
         {
-            get { return (Windows.UI.Xaml.GridLength)GetValue(RowHeightProperty); }
+            get => (Windows.UI.Xaml.GridLength)GetValue(RowHeightProperty);
-            set { SetValue(RowHeightProperty, value); }
+            set => SetValue(RowHeightProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for RowHeight.  This enables animation, styling, binding, etc...

src/Calculator/Views/MainPage.xaml.cs

@@ -3,9 +3,11 @@
 using CalculatorApp.ViewModel;
 using CalculatorApp.ViewModel.Common;
 using CalculatorApp.ViewModel.Common.Automation;
+
 using System;
 using System.Collections.Generic;
 using System.ComponentModel;
+
 using Windows.Foundation;
 using Windows.Graphics.Display;
 using Windows.Storage;
@@ -17,6 +19,7 @@
 using Windows.UI.Xaml.Controls.Primitives;
 using Windows.UI.Xaml.Data;
 using Windows.UI.Xaml.Navigation;
+
 using MUXC = Microsoft.UI.Xaml.Controls;
 
 namespace CalculatorApp
@@ -31,27 +34,27 @@ public sealed partial class MainPage : Page
 
         public List<object> NavViewCategoriesSource
         {
-            get { return (List<object>)GetValue(NavViewCategoriesSourceProperty); }
+            get => (List<object>)GetValue(NavViewCategoriesSourceProperty);
-            set { SetValue(NavViewCategoriesSourceProperty, value); }
+            set => SetValue(NavViewCategoriesSourceProperty, value);
         }
 
-        public ApplicationViewModel Model => m_model;
+        public ApplicationViewModel Model { get; }
 
         public MainPage()
         {
-            m_model = new ApplicationViewModel();
+            Model = new ApplicationViewModel();
             InitializeNavViewCategoriesSource();
             InitializeComponent();
 
             KeyboardShortcutManager.Initialize();
 
             Application.Current.Suspending += App_Suspending;
-            m_model.PropertyChanged += OnAppPropertyChanged;
+            Model.PropertyChanged += OnAppPropertyChanged;
             m_accessibilitySettings = new AccessibilitySettings();
 
-            if(Utilities.GetIntegratedDisplaySize(out var sizeInInches))
+            if (Utilities.GetIntegratedDisplaySize(out var sizeInInches))
             {
-                if(sizeInInches < 7.0) // If device's display size (diagonal length) is less than 7 inches then keep the calc always in Portrait mode only
+                if (sizeInInches < 7.0) // If device's display size (diagonal length) is less than 7 inches then keep the calc always in Portrait mode only
                 {
                     DisplayInformation.AutoRotationPreferences = DisplayOrientations.Portrait | DisplayOrientations.PortraitFlipped;
                 }
@@ -91,7 +94,7 @@ public void SetDefaultFocus()
 
         public void SetHeaderAutomationName()
         {
-            ViewMode mode = m_model.Mode;
+            ViewMode mode = Model.Mode;
             var resProvider = AppResourceProvider.GetInstance();
 
             string name;
@@ -110,7 +113,7 @@ public void SetHeaderAutomationName()
                 {
                     full = resProvider.GetResourceString("HeaderAutomationName_Converter");
                 }
-                name = LocalizationStringUtil.GetLocalizedString(full, m_model.CategoryName);
+                name = LocalizationStringUtil.GetLocalizedString(full, Model.CategoryName);
             }
 
             AutomationProperties.SetName(Header, name);
@@ -134,7 +137,7 @@ protected override void OnNavigatedTo(NavigationEventArgs e)
                 }
             }
 
-            m_model.Initialize(initialMode);
+            Model.Initialize(initialMode);
         }
 
         private void InitializeNavViewCategoriesSource()
@@ -150,7 +153,7 @@ private void InitializeNavViewCategoriesSource()
             {
                 var graphCategory = (NavCategory)NavViewCategoriesSource.Find(x =>
                 {
-                    if(x is NavCategory category)
+                    if (x is NavCategory category)
                     {
                         return category.ViewMode == ViewMode.Graphing;
                     }
@@ -166,10 +169,10 @@ private void InitializeNavViewCategoriesSource()
         private List<object> ExpandNavViewCategoryGroups(IEnumerable<NavCategoryGroup> groups)
         {
             var result = new List<object>();
-            foreach(var group in groups)
+            foreach (var group in groups)
             {
                 result.Add(group);
-                foreach(var category in group.Categories)
+                foreach (var category in group.Categories)
                 {
                     result.Add(category);
                 }
@@ -179,7 +182,7 @@ private List<object> ExpandNavViewCategoryGroups(IEnumerable<NavCategoryGroup> g
 
         private void UpdatePopupSize(Windows.UI.Core.WindowSizeChangedEventArgs e)
         {
-            if(PopupContent != null)
+            if (PopupContent != null)
             {
                 PopupContent.Width = e.Size.Width;
                 PopupContent.Height = e.Size.Height;
@@ -198,43 +201,43 @@ private void OnAppPropertyChanged(object sender, PropertyChangedEventArgs e)
             string propertyName = e.PropertyName;
             if (propertyName == ApplicationViewModel.ModePropertyName)
             {
-                ViewMode newValue = m_model.Mode;
+                ViewMode newValue = Model.Mode;
-                ViewMode previousMode = m_model.PreviousMode;
+                ViewMode previousMode = Model.PreviousMode;
 
                 KeyboardShortcutManager.DisableShortcuts(false);
 
                 if (newValue == ViewMode.Standard)
                 {
                     EnsureCalculator();
-                    m_model.CalculatorViewModel.HistoryVM.AreHistoryShortcutsEnabled = true;
+                    Model.CalculatorViewModel.HistoryVM.AreHistoryShortcutsEnabled = true;
                     m_calculator.AnimateCalculator(NavCategory.IsConverterViewMode(previousMode));
-                    m_model.CalculatorViewModel.HistoryVM.ReloadHistory(newValue);
+                    Model.CalculatorViewModel.HistoryVM.ReloadHistory(newValue);
                 }
                 else if (newValue == ViewMode.Scientific)
                 {
                     EnsureCalculator();
-                    m_model.CalculatorViewModel.HistoryVM.AreHistoryShortcutsEnabled = true;
+                    Model.CalculatorViewModel.HistoryVM.AreHistoryShortcutsEnabled = true;
-                    if (m_model.PreviousMode != ViewMode.Scientific)
+                    if (Model.PreviousMode != ViewMode.Scientific)
                     {
                         m_calculator.AnimateCalculator(NavCategory.IsConverterViewMode(previousMode));
                     }
 
-                    m_model.CalculatorViewModel.HistoryVM.ReloadHistory(newValue);
+                    Model.CalculatorViewModel.HistoryVM.ReloadHistory(newValue);
                 }
                 else if (newValue == ViewMode.Programmer)
                 {
-                    m_model.CalculatorViewModel.HistoryVM.AreHistoryShortcutsEnabled = false;
+                    Model.CalculatorViewModel.HistoryVM.AreHistoryShortcutsEnabled = false;
                     EnsureCalculator();
-                    if (m_model.PreviousMode != ViewMode.Programmer)
+                    if (Model.PreviousMode != ViewMode.Programmer)
                     {
                         m_calculator.AnimateCalculator(NavCategory.IsConverterViewMode(previousMode));
                     }
                 }
                 else if (NavCategory.IsDateCalculatorViewMode(newValue))
                 {
-                    if (m_model.CalculatorViewModel != null)
+                    if (Model.CalculatorViewModel != null)
                     {
-                        m_model.CalculatorViewModel.HistoryVM.AreHistoryShortcutsEnabled = false;
+                        Model.CalculatorViewModel.HistoryVM.AreHistoryShortcutsEnabled = false;
                     }
                     EnsureDateCalculator();
                 }
@@ -245,9 +248,9 @@ private void OnAppPropertyChanged(object sender, PropertyChangedEventArgs e)
                 }
                 else if (NavCategory.IsConverterViewMode(newValue))
                 {
-                    if (m_model.CalculatorViewModel != null)
+                    if (Model.CalculatorViewModel != null)
                     {
-                        m_model.CalculatorViewModel.HistoryVM.AreHistoryShortcutsEnabled = false;
+                        Model.CalculatorViewModel.HistoryVM.AreHistoryShortcutsEnabled = false;
                     }
 
                     EnsureConverter();
@@ -359,7 +362,7 @@ private void Popup_Closed(object sender, object e)
 
         private void OnNavSelectionChanged(object sender, MUXC.NavigationViewSelectionChangedEventArgs e)
         {
-            if(e.IsSettingsSelected)
+            if (e.IsSettingsSelected)
             {
                 ShowSettingsPopup();
                 return;
@@ -423,10 +426,10 @@ private void ShowHideControls(ViewMode mode)
         private void UpdateViewState()
         {
             // All layout related view states are now handled only inside individual controls (standard, scientific, programmer, date, converter)
-            if (NavCategory.IsConverterViewMode(m_model.Mode))
+            if (NavCategory.IsConverterViewMode(Model.Mode))
             {
-                int modeIndex = NavCategoryStates.GetIndexInGroup(m_model.Mode, CategoryGroupType.Converter);
+                int modeIndex = NavCategoryStates.GetIndexInGroup(Model.Mode, CategoryGroupType.Converter);
-                m_model.ConverterViewModel.CurrentCategory = m_model.ConverterViewModel.Categories[modeIndex];
+                Model.ConverterViewModel.CurrentCategory = Model.ConverterViewModel.Categories[modeIndex];
             }
         }
 
@@ -453,7 +456,7 @@ private void OnPageLoaded(object sender, RoutedEventArgs args)
             {
                 // We have just launched into our default mode (standard calc) so ensure calc is loaded
                 EnsureCalculator();
-                m_model.CalculatorViewModel.IsStandard = true;
+                Model.CalculatorViewModel.IsStandard = true;
             }
 
             Window.Current.SizeChanged += WindowSizeChanged;
@@ -477,7 +480,7 @@ private void OnPageLoaded(object sender, RoutedEventArgs args)
 
         private void App_Suspending(object sender, Windows.ApplicationModel.SuspendingEventArgs e)
         {
-            if (m_model.IsAlwaysOnTop)
+            if (Model.IsAlwaysOnTop)
             {
                 ApplicationDataContainer localSettings = ApplicationData.Current.LocalSettings;
                 localSettings.Values[ApplicationViewModel.WidthLocalSettings] = ActualWidth;
@@ -490,20 +493,30 @@ private void EnsureCalculator()
             if (m_calculator == null)
             {
                 // delay load calculator.
-                m_calculator = new Calculator();
+                m_calculator = new Calculator
-                m_calculator.Name = "Calculator";
+                {
-                m_calculator.DataContext = m_model.CalculatorViewModel;
+                    Name = "Calculator",
-                Binding isStandardBinding = new Binding();
+                    DataContext = Model.CalculatorViewModel
-                isStandardBinding.Path = new PropertyPath("IsStandard");
+                };
+                Binding isStandardBinding = new Binding
+                {
+                    Path = new PropertyPath("IsStandard")
+                };
                 m_calculator.SetBinding(Calculator.IsStandardProperty, isStandardBinding);
-                Binding isScientificBinding = new Binding();
+                Binding isScientificBinding = new Binding
-                isScientificBinding.Path = new PropertyPath("IsScientific");
+                {
+                    Path = new PropertyPath("IsScientific")
+                };
                 m_calculator.SetBinding(Calculator.IsScientificProperty, isScientificBinding);
-                Binding isProgramerBinding = new Binding();
+                Binding isProgramerBinding = new Binding
-                isProgramerBinding.Path = new PropertyPath("IsProgrammer");
+                {
+                    Path = new PropertyPath("IsProgrammer")
+                };
                 m_calculator.SetBinding(Calculator.IsProgrammerProperty, isProgramerBinding);
-                Binding isAlwaysOnTopBinding = new Binding();
+                Binding isAlwaysOnTopBinding = new Binding
-                isAlwaysOnTopBinding.Path = new PropertyPath("IsAlwaysOnTop");
+                {
+                    Path = new PropertyPath("IsAlwaysOnTop")
+                };
                 m_calculator.SetBinding(Calculator.IsAlwaysOnTopProperty, isAlwaysOnTopBinding);
                 m_calculator.Style = CalculatorBaseStyle;
 
@@ -526,9 +539,11 @@ private void EnsureDateCalculator()
             if (m_dateCalculator == null)
             {
                 // delay loading converter
-                m_dateCalculator = new DateCalculator();
+                m_dateCalculator = new DateCalculator
-                m_dateCalculator.Name = "dateCalculator";
+                {
-                m_dateCalculator.DataContext = m_model.DateCalcViewModel;
+                    Name = "dateCalculator",
+                    DataContext = Model.DateCalcViewModel
+                };
 
                 DateCalcHolder.Child = m_dateCalculator;
             }
@@ -544,9 +559,11 @@ private void EnsureGraphingCalculator()
         {
             if (m_graphingCalculator == null)
             {
-                m_graphingCalculator = new GraphingCalculator();
+                m_graphingCalculator = new GraphingCalculator
-                m_graphingCalculator.Name = "GraphingCalculator";
+                {
-                m_graphingCalculator.DataContext = m_model.GraphingCalcViewModel;
+                    Name = "GraphingCalculator",
+                    DataContext = Model.GraphingCalcViewModel
+                };
 
                 GraphingCalcHolder.Child = m_graphingCalculator;
             }
@@ -557,10 +574,12 @@ private void EnsureConverter()
             if (m_converter == null)
             {
                 // delay loading converter
-                m_converter = new CalculatorApp.UnitConverter();
+                m_converter = new CalculatorApp.UnitConverter
-                m_converter.Name = "unitConverter";
+                {
-                m_converter.DataContext = m_model.ConverterViewModel;
+                    Name = "unitConverter",
-                m_converter.Style = UnitConverterBaseStyle;
+                    DataContext = Model.ConverterViewModel,
+                    Style = UnitConverterBaseStyle
+                };
                 ConverterHolder.Child = m_converter;
             }
         }
@@ -596,7 +615,6 @@ private void Settings_BackButtonClick(object sender, RoutedEventArgs e)
         private GraphingCalculator m_graphingCalculator;
         private UnitConverter m_converter;
         private DateCalculator m_dateCalculator;
-        private ApplicationViewModel m_model;
+        private readonly AccessibilitySettings m_accessibilitySettings;
-        private AccessibilitySettings m_accessibilitySettings;
     }
 }

src/Calculator/Views/Memory.xaml.cs

@@ -1,6 +1,6 @@
 using CalculatorApp.ViewModel;
 using CalculatorApp.ViewModel.Common;
-using System;
+
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Controls;
 
@@ -17,18 +17,12 @@ public Memory()
             MemoryPaneEmpty.FlowDirection = LocalizationService.GetInstance().GetFlowDirection();
         }
 
-        public CalculatorApp.ViewModel.StandardCalculatorViewModel Model
+        public CalculatorApp.ViewModel.StandardCalculatorViewModel Model => (CalculatorApp.ViewModel.StandardCalculatorViewModel)this.DataContext;
-        {
-            get
-            {
-                return (CalculatorApp.ViewModel.StandardCalculatorViewModel)this.DataContext;
-            }
-        }
 
         public GridLength RowHeight
         {
-            get { return (GridLength)GetValue(RowHeightProperty); }
+            get => (GridLength)GetValue(RowHeightProperty);
-            set { SetValue(RowHeightProperty, value); }
+            set => SetValue(RowHeightProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for RowHeight.  This enables animation, styling, binding, etc...

src/Calculator/Views/MemoryListItem.xaml.cs

@@ -1,5 +1,4 @@
-using System;
+using Windows.UI.Xaml;
-using Windows.UI.Xaml;
 using Windows.UI.Xaml.Controls;
 
 // The User Control item template is documented at https://go.microsoft.com/fwlink/?LinkId=234236
@@ -16,8 +15,8 @@ public MemoryListItem()
 
         public CalculatorApp.ViewModel.MemoryItemViewModel Model
         {
-            get { return (CalculatorApp.ViewModel.MemoryItemViewModel)GetValue(ModelProperty); }
+            get => (CalculatorApp.ViewModel.MemoryItemViewModel)GetValue(ModelProperty);
-            set { SetValue(ModelProperty, value); }
+            set => SetValue(ModelProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for Model.  This enables animation, styling, binding, etc...

src/Calculator/Views/NumberPad.xaml.cs

@@ -1,4 +1,5 @@
 using CalculatorApp.ViewModel.Common;
+
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Controls;
 
@@ -30,8 +31,8 @@ public NumberPad()
 
         public Windows.UI.Xaml.Style ButtonStyle
         {
-            get { return (Windows.UI.Xaml.Style)GetValue(ButtonStyleProperty); }
+            get => (Windows.UI.Xaml.Style)GetValue(ButtonStyleProperty);
-            set { SetValue(ButtonStyleProperty, value); }
+            set => SetValue(ButtonStyleProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for ButtonStyle.  This enables animation, styling, binding, etc...
@@ -40,8 +41,8 @@ public Windows.UI.Xaml.Style ButtonStyle
 
         public CalculatorApp.ViewModel.Common.NumberBase CurrentRadixType
         {
-            get { return (CalculatorApp.ViewModel.Common.NumberBase)GetValue(CurrentRadixTypeProperty); }
+            get => (CalculatorApp.ViewModel.Common.NumberBase)GetValue(CurrentRadixTypeProperty);
-            set { SetValue(CurrentRadixTypeProperty, value); }
+            set => SetValue(CurrentRadixTypeProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for CurrentRadixType.  This enables animation, styling, binding, etc...
@@ -54,7 +55,7 @@ public CalculatorApp.ViewModel.Common.NumberBase CurrentRadixType
 
         public bool IsErrorVisualState
         {
-            get { return m_isErrorVisualState; }
+            get => m_isErrorVisualState;
             set
             {
                 if (m_isErrorVisualState != value)

src/Calculator/Views/OperatorsPanel.xaml.cs

@@ -8,10 +8,7 @@ namespace CalculatorApp
     [Windows.Foundation.Metadata.WebHostHidden]
     public sealed partial class OperatorsPanel : UserControl
     {
-        public CalculatorApp.ViewModel.StandardCalculatorViewModel Model
+        public CalculatorApp.ViewModel.StandardCalculatorViewModel Model => (CalculatorApp.ViewModel.StandardCalculatorViewModel)DataContext;
-        {
-            get => (CalculatorApp.ViewModel.StandardCalculatorViewModel)DataContext;
-        }
 
         public OperatorsPanel()
         {
@@ -20,8 +17,8 @@ public OperatorsPanel()
 
         public bool IsBitFlipChecked
         {
-            get { return (bool)GetValue(IsBitFlipCheckedProperty); }
+            get => (bool)GetValue(IsBitFlipCheckedProperty);
-            set { SetValue(IsBitFlipCheckedProperty, value); }
+            set => SetValue(IsBitFlipCheckedProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for IsBitFlipChecked.  This enables animation, styling, binding, etc...
@@ -34,8 +31,8 @@ public bool IsBitFlipChecked
 
         public bool IsErrorVisualState
         {
-            get { return (bool)GetValue(IsErrorVisualStateProperty); }
+            get => (bool)GetValue(IsErrorVisualStateProperty);
-            set { SetValue(IsErrorVisualStateProperty, value); }
+            set => SetValue(IsErrorVisualStateProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for IsErrorVisualState.  This enables animation, styling, binding, etc...
@@ -46,7 +43,7 @@ public bool IsErrorVisualState
                 self.OnIsErrorVisualStatePropertyChanged((bool)args.OldValue, (bool)args.NewValue);
             }));
 
-        void OnIsBitFlipCheckedPropertyChanged(bool oldValue, bool newValue)
+        private void OnIsBitFlipCheckedPropertyChanged(bool oldValue, bool newValue)
         {
             if (newValue)
             {

src/Calculator/Views/Settings.xaml.cs

@@ -1,21 +1,18 @@
 using CalculatorApp.Utils;
 using CalculatorApp.ViewModel.Common;
-using System;
-using System.Collections.Generic;
-using System.Diagnostics;
-using System.IO;
-using System.Linq;
-using System.Runtime.InteropServices.WindowsRuntime;
-using Windows.ApplicationModel;
-using Windows.Foundation;
-using Windows.Foundation.Collections;
-using Windows.System;
-using Windows.UI.Xaml;
-using Windows.UI.Xaml.Controls;
 using CalculatorApp.ViewModel.Common.Automation;
+
+using System;
+using System.Diagnostics;
+using System.Linq;
+
+using Windows.ApplicationModel;
+using Windows.System;
 using Windows.UI.Core;
+using Windows.UI.Xaml;
 using Windows.UI.Xaml.Automation.Peers;
 using Windows.UI.Xaml.Automation.Provider;
+using Windows.UI.Xaml.Controls;
 
 // The User Control item template is documented at https://go.microsoft.com/fwlink/?LinkId=234236
 
@@ -29,8 +26,8 @@ public sealed partial class Settings : UserControl
 
         public GridLength TitleBarHeight
         {
-            get { return (GridLength)GetValue(TitleBarHeightProperty); }
+            get => (GridLength)GetValue(TitleBarHeightProperty);
-            set { SetValue(TitleBarHeightProperty, value); }
+            set => SetValue(TitleBarHeightProperty, value);
         }
         public static readonly DependencyProperty TitleBarHeightProperty =
             DependencyProperty.Register(nameof(TitleBarHeight), typeof(GridLength), typeof(Settings), new PropertyMetadata(default(GridLength)));

src/Calculator/Views/StateTriggers/AspectRatioTrigger.cs

@@ -30,8 +30,8 @@ public AspectRatioTrigger()
         /* The source for which this class will respond to size changed events. */
         public FrameworkElement Source
         {
-            get { return (FrameworkElement)GetValue(SourceProperty); }
+            get => (FrameworkElement)GetValue(SourceProperty);
-            set { SetValue(SourceProperty, value); }
+            set => SetValue(SourceProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for Source.  This enables animation, styling, binding, etc...
@@ -46,8 +46,8 @@ public FrameworkElement Source
            the aspect ratio. */
         public Aspect NumeratorAspect
         {
-            get { return (Aspect)GetValue(NumeratorAspectProperty); }
+            get => (Aspect)GetValue(NumeratorAspectProperty);
-            set { SetValue(NumeratorAspectProperty, value); }
+            set => SetValue(NumeratorAspectProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for NumeratorAspect  This enables animation, styling, binding, etc...
@@ -57,8 +57,8 @@ public Aspect NumeratorAspect
         /* The threshold that will cause the trigger to fire when the aspect ratio exceeds this value. */
         public double Threshold
         {
-            get { return (double)GetValue(ThresholdProperty); }
+            get => (double)GetValue(ThresholdProperty);
-            set { SetValue(ThresholdProperty, value); }
+            set => SetValue(ThresholdProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for Threshold.  This enables animation, styling, binding, etc...
@@ -68,8 +68,8 @@ public double Threshold
         /* If true, the trigger will fire if the aspect ratio is greater than or equal to the threshold. */
         public bool ActiveIfEqual
         {
-            get { return (bool)GetValue(ActiveIfEqualProperty); }
+            get => (bool)GetValue(ActiveIfEqualProperty);
-            set { SetValue(ActiveIfEqualProperty, value); }
+            set => SetValue(ActiveIfEqualProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for ActiveEqual.  This enables animation, styling, binding, etc...

src/Calculator/Views/StateTriggers/ControlSizeTrigger.cs

@@ -1,8 +1,6 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
-using System;
-
 using Windows.Foundation;
 using Windows.UI.Xaml;
 
@@ -17,8 +15,8 @@ public ControlSizeTrigger()
 
         public FrameworkElement Source
         {
-            get { return (FrameworkElement)GetValue(SourceProperty); }
+            get => (FrameworkElement)GetValue(SourceProperty);
-            set { SetValue(SourceProperty, value); }
+            set => SetValue(SourceProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for Source.  This enables animation, styling, binding, etc...
@@ -31,8 +29,8 @@ public FrameworkElement Source
 
         public double MinHeight
         {
-            get { return (double)GetValue(MinHeightProperty); }
+            get => (double)GetValue(MinHeightProperty);
-            set { SetValue(MinHeightProperty, value); }
+            set => SetValue(MinHeightProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for MinHeight.  This enables animation, styling, binding, etc...
@@ -41,8 +39,8 @@ public double MinHeight
 
         public double MinWidth
         {
-            get { return (double)GetValue(MinWidthProperty); }
+            get => (double)GetValue(MinWidthProperty);
-            set { SetValue(MinWidthProperty, value); }
+            set => SetValue(MinWidthProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for MinWidth.  This enables animation, styling, binding, etc...

src/Calculator/Views/SupplementaryResults.xaml.cs

@@ -1,7 +1,9 @@
 using CalculatorApp.ViewModel;
+
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
+
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Controls;
 
@@ -13,8 +15,10 @@ public sealed class DelighterUnitToStyleConverter : Windows.UI.Xaml.Data.IValueC
     {
         public DelighterUnitToStyleConverter()
         {
-            m_delighters = new Windows.UI.Xaml.ResourceDictionary();
+            m_delighters = new Windows.UI.Xaml.ResourceDictionary
-            m_delighters.Source = new Uri(@"ms-appx:///Views/DelighterUnitStyles.xaml");
+            {
+                Source = new Uri(@"ms-appx:///Views/DelighterUnitStyles.xaml")
+            };
         }
 
         public object Convert(object value, Type targetType, object parameter, string language)
@@ -37,7 +41,7 @@ public object ConvertBack(object value, Type targetType, object parameter, strin
             return null;
         }
 
-        private Windows.UI.Xaml.ResourceDictionary m_delighters;
+        private readonly Windows.UI.Xaml.ResourceDictionary m_delighters;
     }
 
     public sealed class SupplementaryResultDataTemplateSelector : Windows.UI.Xaml.Controls.DataTemplateSelector
@@ -45,17 +49,9 @@ public sealed class SupplementaryResultDataTemplateSelector : Windows.UI.Xaml.Co
         public SupplementaryResultDataTemplateSelector()
         { }
 
-        public Windows.UI.Xaml.DataTemplate RegularTemplate
+        public Windows.UI.Xaml.DataTemplate RegularTemplate { get; set; }
-        {
-            get => m_regularTemplate;
-            set => m_regularTemplate = value;
-        }
 
-        public Windows.UI.Xaml.DataTemplate DelighterTemplate
+        public Windows.UI.Xaml.DataTemplate DelighterTemplate { get; set; }
-        {
-            get => m_delighterTemplate;
-            set => m_delighterTemplate = value;
-        }
 
         protected override DataTemplate SelectTemplateCore(object item, DependencyObject container)
         {
@@ -69,9 +65,6 @@ protected override DataTemplate SelectTemplateCore(object item, DependencyObject
                 return RegularTemplate;
             }
         }
-
-        private Windows.UI.Xaml.DataTemplate m_regularTemplate;
-        private Windows.UI.Xaml.DataTemplate m_delighterTemplate;
     }
 
     public sealed class SupplementaryResultNoOverflowStackPanel : CalculatorApp.Controls.HorizontalNoOverflowStackPanel
@@ -83,14 +76,12 @@ protected override bool ShouldPrioritizeLastItem()
                 return false;
             }
 
-            var lastChild = Children[Children.Count - 1] as FrameworkElement;
+            if (!(Children[Children.Count - 1] is FrameworkElement lastChild))
-            if (lastChild == null)
             {
                 return false;
             }
 
-            var suppResult = lastChild.DataContext as SupplementaryResult;
+            return lastChild.DataContext is SupplementaryResult suppResult && suppResult.IsWhimsical();
-            return suppResult == null ? false : suppResult.IsWhimsical();
         }
     }
 
@@ -104,8 +95,8 @@ public SupplementaryResults()
 
         public IEnumerable<ViewModel.SupplementaryResult> Results
         {
-            get { return (IEnumerable<ViewModel.SupplementaryResult>)GetValue(ResultsProperty); }
+            get => (IEnumerable<ViewModel.SupplementaryResult>)GetValue(ResultsProperty);
-            set { SetValue(ResultsProperty, value); }
+            set => SetValue(ResultsProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for Results.  This enables animation, styling, binding, etc...

src/Calculator/Views/TitleBar.xaml.cs

@@ -1,4 +1,5 @@
 using CalculatorApp.ViewModel.Common;
+
 using Windows.ApplicationModel.Core;
 using Windows.System.Profile;
 using Windows.UI.Core;
@@ -34,8 +35,8 @@ public TitleBar()
 
         public bool IsAlwaysOnTopMode
         {
-            get { return (bool)GetValue(IsAlwaysOnTopModeProperty); }
+            get => (bool)GetValue(IsAlwaysOnTopModeProperty);
-            set { SetValue(IsAlwaysOnTopModeProperty, value); }
+            set => SetValue(IsAlwaysOnTopModeProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for IsAlwaysOnTopMode.  This enables animation, styling, binding, etc...
@@ -89,7 +90,7 @@ private void OnUnloaded(object sender, RoutedEventArgs e)
 
         private void RootFrame_RequestedThemeChanged(DependencyObject sender, DependencyProperty dp)
         {
-            if(Frame.RequestedThemeProperty == dp)
+            if (Frame.RequestedThemeProperty == dp)
             {
                 _ = Dispatcher.RunAsync(CoreDispatcherPriority.Normal, new DispatchedHandler(() => { SetTitleBarControlColors(); }));
             }
@@ -210,64 +211,64 @@ private void AlwaysOnTopButton_Click(object sender, RoutedEventArgs e)
         // Dependency properties for the color of the system title bar buttons
         public Windows.UI.Xaml.Media.SolidColorBrush ButtonBackground
         {
-            get { return (Windows.UI.Xaml.Media.SolidColorBrush)GetValue(ButtonBackgroundProperty); }
+            get => (Windows.UI.Xaml.Media.SolidColorBrush)GetValue(ButtonBackgroundProperty);
-            set { SetValue(ButtonBackgroundProperty, value); }
+            set => SetValue(ButtonBackgroundProperty, value);
         }
         public static readonly DependencyProperty ButtonBackgroundProperty =
             DependencyProperty.Register(nameof(ButtonBackground), typeof(Windows.UI.Xaml.Media.SolidColorBrush), typeof(TitleBar), new PropertyMetadata(null));
 
         public Windows.UI.Xaml.Media.SolidColorBrush ButtonForeground
         {
-            get { return (Windows.UI.Xaml.Media.SolidColorBrush)GetValue(ButtonForegroundProperty); }
+            get => (Windows.UI.Xaml.Media.SolidColorBrush)GetValue(ButtonForegroundProperty);
-            set { SetValue(ButtonForegroundProperty, value); }
+            set => SetValue(ButtonForegroundProperty, value);
         }
         public static readonly DependencyProperty ButtonForegroundProperty =
             DependencyProperty.Register(nameof(ButtonForeground), typeof(Windows.UI.Xaml.Media.SolidColorBrush), typeof(TitleBar), new PropertyMetadata(null));
 
         public Windows.UI.Xaml.Media.SolidColorBrush ButtonInactiveBackground
         {
-            get { return (Windows.UI.Xaml.Media.SolidColorBrush)GetValue(ButtonInactiveBackgroundProperty); }
+            get => (Windows.UI.Xaml.Media.SolidColorBrush)GetValue(ButtonInactiveBackgroundProperty);
-            set { SetValue(ButtonInactiveBackgroundProperty, value); }
+            set => SetValue(ButtonInactiveBackgroundProperty, value);
         }
         public static readonly DependencyProperty ButtonInactiveBackgroundProperty =
             DependencyProperty.Register(nameof(ButtonInactiveBackground), typeof(Windows.UI.Xaml.Media.SolidColorBrush), typeof(TitleBar), new PropertyMetadata(null));
 
         public Windows.UI.Xaml.Media.SolidColorBrush ButtonInactiveForeground
         {
-            get { return (Windows.UI.Xaml.Media.SolidColorBrush)GetValue(ButtonInactiveForegroundProperty); }
+            get => (Windows.UI.Xaml.Media.SolidColorBrush)GetValue(ButtonInactiveForegroundProperty);
-            set { SetValue(ButtonInactiveForegroundProperty, value); }
+            set => SetValue(ButtonInactiveForegroundProperty, value);
         }
         public static readonly DependencyProperty ButtonInactiveForegroundProperty =
             DependencyProperty.Register(nameof(ButtonInactiveForeground), typeof(Windows.UI.Xaml.Media.SolidColorBrush), typeof(TitleBar), new PropertyMetadata(null));
 
         public Windows.UI.Xaml.Media.SolidColorBrush ButtonHoverBackground
         {
-            get { return (Windows.UI.Xaml.Media.SolidColorBrush)GetValue(ButtonHoverBackgroundProperty); }
+            get => (Windows.UI.Xaml.Media.SolidColorBrush)GetValue(ButtonHoverBackgroundProperty);
-            set { SetValue(ButtonHoverBackgroundProperty, value); }
+            set => SetValue(ButtonHoverBackgroundProperty, value);
         }
         public static readonly DependencyProperty ButtonHoverBackgroundProperty =
             DependencyProperty.Register(nameof(ButtonHoverBackground), typeof(Windows.UI.Xaml.Media.SolidColorBrush), typeof(TitleBar), new PropertyMetadata(null));
 
         public Windows.UI.Xaml.Media.SolidColorBrush ButtonHoverForeground
         {
-            get { return (Windows.UI.Xaml.Media.SolidColorBrush)GetValue(ButtonHoverForegroundProperty); }
+            get => (Windows.UI.Xaml.Media.SolidColorBrush)GetValue(ButtonHoverForegroundProperty);
-            set { SetValue(ButtonHoverForegroundProperty, value); }
+            set => SetValue(ButtonHoverForegroundProperty, value);
         }
         public static readonly DependencyProperty ButtonHoverForegroundProperty =
             DependencyProperty.Register(nameof(ButtonHoverForeground), typeof(Windows.UI.Xaml.Media.SolidColorBrush), typeof(TitleBar), new PropertyMetadata(null));
 
         public Windows.UI.Xaml.Media.SolidColorBrush ButtonPressedBackground
         {
-            get { return (Windows.UI.Xaml.Media.SolidColorBrush)GetValue(ButtonPressedBackgroundProperty); }
+            get => (Windows.UI.Xaml.Media.SolidColorBrush)GetValue(ButtonPressedBackgroundProperty);
-            set { SetValue(ButtonPressedBackgroundProperty, value); }
+            set => SetValue(ButtonPressedBackgroundProperty, value);
         }
         public static readonly DependencyProperty ButtonPressedBackgroundProperty =
             DependencyProperty.Register(nameof(ButtonPressedBackground), typeof(Windows.UI.Xaml.Media.SolidColorBrush), typeof(TitleBar), new PropertyMetadata(null));
 
         public Windows.UI.Xaml.Media.SolidColorBrush ButtonPressedForeground
         {
-            get { return (Windows.UI.Xaml.Media.SolidColorBrush)GetValue(ButtonPressedForegroundProperty); }
+            get => (Windows.UI.Xaml.Media.SolidColorBrush)GetValue(ButtonPressedForegroundProperty);
-            set { SetValue(ButtonPressedForegroundProperty, value); }
+            set => SetValue(ButtonPressedForegroundProperty, value);
         }
         public static readonly DependencyProperty ButtonPressedForegroundProperty =
             DependencyProperty.Register(nameof(ButtonPressedForeground), typeof(Windows.UI.Xaml.Media.SolidColorBrush), typeof(TitleBar), new PropertyMetadata(null));
@@ -280,15 +281,16 @@ public bool BackButtonSpaceReserved
         public static readonly DependencyProperty BackButtonSpaceReservedProperty =
             DependencyProperty.Register(
                 nameof(BackButtonSpaceReserved), typeof(bool), typeof(TitleBar),
-                new PropertyMetadata(false, new PropertyChangedCallback((sender, args)=> {
+                new PropertyMetadata(false, new PropertyChangedCallback((sender, args) =>
+                {
                     var self = sender as TitleBar;
                     VisualStateManager.GoToState(
                         self, (bool)args.NewValue ? self.BackButtonVisible.Name : self.BackButtonCollapsed.Name, true);
                 })));
 
-        private Windows.ApplicationModel.Core.CoreApplicationViewTitleBar m_coreTitleBar;
+        private readonly Windows.ApplicationModel.Core.CoreApplicationViewTitleBar m_coreTitleBar;
-        private Windows.UI.ViewManagement.UISettings m_uiSettings;
+        private readonly Windows.UI.ViewManagement.UISettings m_uiSettings;
-        private Windows.UI.ViewManagement.AccessibilitySettings m_accessibilitySettings;
+        private readonly Windows.UI.ViewManagement.AccessibilitySettings m_accessibilitySettings;
         private Utils.ThemeHelper.ThemeChangedCallbackToken m_rootFrameRequestedThemeCallbackToken;
     }
 }

src/Calculator/Views/UnitConverter.xaml.cs

@@ -2,10 +2,12 @@
 using CalculatorApp.Controls;
 using CalculatorApp.ViewModel;
 using CalculatorApp.ViewModel.Common;
+
 using System;
 using System.ComponentModel;
 using System.Diagnostics;
 using System.Threading.Tasks;
+
 using Windows.Foundation;
 using Windows.System;
 using Windows.UI.ViewManagement;
@@ -18,7 +20,7 @@
 
 namespace CalculatorApp
 {
-    class Activatable : ViewModel.IActivatable
+    internal class Activatable : ViewModel.IActivatable
     {
         public Activatable(Func<bool> getter, Action<bool> setter)
         {
@@ -32,8 +34,8 @@ public bool IsActive
             set => m_setter(value);
         }
 
-        private Func<bool> m_getter;
+        private readonly Func<bool> m_getter;
-        private Action<bool> m_setter;
+        private readonly Action<bool> m_setter;
     }
 
     public sealed partial class UnitConverter : UserControl
@@ -41,8 +43,8 @@ public sealed partial class UnitConverter : UserControl
         public UnitConverter()
         {
             m_meteredConnectionOverride = false;
-            m_layoutDirection = LocalizationService.GetInstance().GetFlowDirection();
+            LayoutDirection = LocalizationService.GetInstance().GetFlowDirection();
-            m_FlowDirectionHorizontalAlignment = m_layoutDirection == FlowDirection.RightToLeft ? HorizontalAlignment.Right : HorizontalAlignment.Left;
+            FlowDirectionHorizontalAlignment = LayoutDirection == FlowDirection.RightToLeft ? HorizontalAlignment.Right : HorizontalAlignment.Left;
 
             InitializeComponent();
 
@@ -68,12 +70,7 @@ public UnitConverter()
             PasteMenuItem.Text = resLoader.GetResourceString("pasteMenuItem");
         }
 
-        public Windows.UI.Xaml.HorizontalAlignment FlowDirectionHorizontalAlignment
+        public Windows.UI.Xaml.HorizontalAlignment FlowDirectionHorizontalAlignment { get; } = default;
-        {
-            get => this.m_FlowDirectionHorizontalAlignment;
-        }
-
-        private Windows.UI.Xaml.HorizontalAlignment m_FlowDirectionHorizontalAlignment = default(HorizontalAlignment);
 
         public void AnimateConverter()
         {
@@ -83,15 +80,9 @@ public void AnimateConverter()
             }
         }
 
-        public CalculatorApp.ViewModel.UnitConverterViewModel Model
+        public CalculatorApp.ViewModel.UnitConverterViewModel Model => (CalculatorApp.ViewModel.UnitConverterViewModel)this.DataContext;
-        {
-            get => (CalculatorApp.ViewModel.UnitConverterViewModel)this.DataContext;
-        }
 
-        public Windows.UI.Xaml.FlowDirection LayoutDirection
+        public Windows.UI.Xaml.FlowDirection LayoutDirection { get; } = default;
-        {
-            get => this.m_layoutDirection;
-        }
 
         public void SetDefaultFocus()
         {
@@ -121,8 +112,7 @@ private void OnContextRequested(UIElement sender, ContextRequestedEventArgs e)
 
             PasteMenuItem.IsEnabled = CopyPasteManager.HasStringToPaste();
 
-            Point point;
+            if (e.TryGetPosition(requestedElement, out Point point))
-            if (e.TryGetPosition(requestedElement, out point))
             {
                 m_resultsFlyout.ShowAt(requestedElement, point);
             }
@@ -146,7 +136,7 @@ private void OnCopyMenuItemClicked(object sender, RoutedEventArgs e)
             CopyPasteManager.CopyToClipboard(calcResult.GetRawDisplayValue());
         }
 
-        void OnPasteMenuItemClicked(object sender, RoutedEventArgs e)
+        private void OnPasteMenuItemClicked(object sender, RoutedEventArgs e)
         {
             UnitConverter that = this;
             _ = Task.Run(async () =>
@@ -276,7 +266,7 @@ private void OnNormalNetworkAccess()
             }
         }
 
-        void OnOptInNetworkAccess()
+        private void OnOptInNetworkAccess()
         {
             CurrencyRefreshBlockControl.Visibility = Visibility.Visible;
             OfflineBlock.Visibility = Visibility.Collapsed;
@@ -291,7 +281,7 @@ void OnOptInNetworkAccess()
             }
         }
 
-        void OnOfflineNetworkAccess()
+        private void OnOfflineNetworkAccess()
         {
             CurrencyRefreshBlockControl.Visibility = Visibility.Collapsed;
             OfflineBlock.Visibility = Visibility.Visible;
@@ -361,8 +351,10 @@ private void StartProgressRingWithDelay()
 
             TimeSpan delay = TimeSpan.FromMilliseconds(500);
 
-            m_delayTimer = new DispatcherTimer();
+            m_delayTimer = new DispatcherTimer
-            m_delayTimer.Interval = delay;
+            {
+                Interval = delay
+            };
             m_delayTimer.Tick += OnDelayTimerTick;
 
             m_delayTimer.Start();
@@ -396,12 +388,11 @@ private void OnVisualStateChanged(object sender, Windows.UI.Xaml.VisualStateChan
             TraceLogger.GetInstance().LogVisualStateChanged(mode, e.NewState.Name, false);
         }
 
-        private static Lazy<UISettings> uiSettings = new Lazy<UISettings>(true);
+        private static readonly Lazy<UISettings> uiSettings = new Lazy<UISettings>(true);
-        private Windows.UI.Xaml.FlowDirection m_layoutDirection = default(FlowDirection);
+        private readonly Windows.UI.Xaml.Controls.MenuFlyout m_resultsFlyout = default;
-        private Windows.UI.Xaml.Controls.MenuFlyout m_resultsFlyout = default(MenuFlyout);
 
-        private string m_chargesMayApplyText = string.Empty;
+        private readonly string m_chargesMayApplyText = string.Empty;
-        private string m_failedToRefreshText = string.Empty;
+        private readonly string m_failedToRefreshText = string.Empty;
 
         private bool m_meteredConnectionOverride;
 

src/Calculator/WindowFrameService.cs

@@ -3,11 +3,13 @@
 
 using CalculatorApp.Common;
 using CalculatorApp.ViewModel.Common;
+
 using System;
 using System.Collections.Generic;
 using System.Data;
 using System.Diagnostics;
 using System.Threading.Tasks;
+
 using Windows.ApplicationModel.Core;
 using Windows.UI.Core;
 using Windows.UI.ViewManagement;
@@ -164,8 +166,7 @@ private void OnClosed(CoreWindow sender, CoreWindowEventArgs args)
         // Returns nullptr if no service is registered with the specified id
         private object TryResolveRuntimeWindowService(Type serviceId)
         {
-            object retval;
+            if (m_runtimeServicesMap.TryGetValue(serviceId.Name, out object retval))
-            if (m_runtimeServicesMap.TryGetValue(serviceId.Name, out retval))
             {
                 return retval;
             }
@@ -175,14 +176,14 @@ private object TryResolveRuntimeWindowService(Type serviceId)
             }
         }
 
-        private Windows.UI.Core.CoreWindow m_currentWindow;
+        private readonly Windows.UI.Core.CoreWindow m_currentWindow;
-        private Windows.UI.Core.CoreDispatcher m_coreDispatcher;
+        private readonly Windows.UI.Core.CoreDispatcher m_coreDispatcher;
         private Windows.UI.Xaml.Controls.Frame m_frame;
-        private int m_viewId;
+        private readonly int m_viewId;
-        private WeakReference m_parent;
+        private readonly WeakReference m_parent;
 
-        private Dictionary<string, object> m_runtimeServicesMap = new Dictionary<string, object>();
+        private readonly Dictionary<string, object> m_runtimeServicesMap = new Dictionary<string, object>();
-        private List<Action> m_onWindowClosingHandlers = new List<Action>();
+        private readonly List<Action> m_onWindowClosingHandlers = new List<Action>();
     }
 }
 

src/CalculatorUITestFramework/CalculatorApp.cs

@@ -2,6 +2,7 @@
 // Licensed under the MIT License.
 using OpenQA.Selenium;
 using OpenQA.Selenium.Appium.Windows;
+
 using System.Drawing;
 
 namespace CalculatorUITestFramework

src/CalculatorUITestFramework/CalculatorResults.cs

@@ -1,9 +1,10 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 using Microsoft.VisualStudio.TestTools.UnitTesting;
+
 using OpenQA.Selenium.Appium.Windows;
+
 using System;
-using OpenQA.Selenium.Interactions;
 
 namespace CalculatorUITestFramework
 {

src/CalculatorUITestFramework/HistoryItem.cs

@@ -2,9 +2,6 @@
 // Licensed under the MIT License.
 
 using OpenQA.Selenium.Appium;
-using System;
-using System.Collections.Generic;
-using System.Text;
 
 namespace CalculatorUITestFramework
 {

src/CalculatorUITestFramework/HistoryPanel.cs

@@ -2,11 +2,10 @@
 // Licensed under the MIT License.
 
 using OpenQA.Selenium;
-using OpenQA.Selenium.Appium;
 using OpenQA.Selenium.Appium.Windows;
 using OpenQA.Selenium.Interactions;
+
 using System.Collections.Generic;
-using System.Collections.ObjectModel;
 using System.Drawing;
 using System.Linq;
 

src/CalculatorUITestFramework/MemoryItem.cs

@@ -2,9 +2,6 @@
 // Licensed under the MIT License.
 
 using OpenQA.Selenium.Appium;
-using System;
-using System.Collections.Generic;
-using System.Text;
 
 namespace CalculatorUITestFramework
 {

src/CalculatorUITestFramework/MemoryPanel.cs

@@ -2,12 +2,12 @@
 // Licensed under the MIT License.
 
 using Microsoft.VisualStudio.TestTools.UnitTesting;
+
 using OpenQA.Selenium;
-using OpenQA.Selenium.Appium;
 using OpenQA.Selenium.Appium.Windows;
 using OpenQA.Selenium.Interactions;
+
 using System.Collections.Generic;
-using System.Collections.ObjectModel;
 using System.Drawing;
 using System.Linq;
 

src/CalculatorUITestFramework/NavigationMenu.cs

@@ -2,6 +2,7 @@
 // Licensed under the MIT License.
 
 using OpenQA.Selenium.Appium.Windows;
+
 using System;
 
 namespace CalculatorUITestFramework

src/CalculatorUITestFramework/NumberPad.cs

@@ -2,6 +2,7 @@
 // Licensed under the MIT License.
 
 using OpenQA.Selenium.Appium.Windows;
+
 using System;
 using System.Globalization;
 
@@ -76,7 +77,7 @@ public void Input(double number)
                         this.NegateButton.Click();
                         break;
                     default:
-                        throw (new ArgumentException(String.Format("{0} is not valid", digit)));
+                        throw (new ArgumentException(string.Format("{0} is not valid", digit)));
                 }
             }
         }

src/CalculatorUITestFramework/ProgrammerCalculatorPage.cs

@@ -1,7 +1,6 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
-using Microsoft.VisualStudio.TestTools.UnitTesting;
 using OpenQA.Selenium.Appium.Windows;
 
 namespace CalculatorUITestFramework

src/CalculatorUITestFramework/ProgrammerOperatorsPanel.cs

@@ -3,11 +3,6 @@
 
 using OpenQA.Selenium;
 using OpenQA.Selenium.Appium.Windows;
-using System.Collections.Generic;
-using System.Diagnostics.Contracts;
-using System.Runtime.InteropServices.ComTypes;
-using System;
-using System.Diagnostics;
 
 namespace CalculatorUITestFramework
 {

src/CalculatorUITestFramework/ScientificCalculatorPage.cs

@@ -1,7 +1,6 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
-using Microsoft.VisualStudio.TestTools.UnitTesting;
 using OpenQA.Selenium.Appium.Windows;
 
 namespace CalculatorUITestFramework

src/CalculatorUITestFramework/ScientificOperatorsPanel.cs

@@ -3,11 +3,8 @@
 
 using OpenQA.Selenium;
 using OpenQA.Selenium.Appium.Windows;
-using System.Collections.Generic;
+
-using System.Diagnostics.Contracts;
-using System.Runtime.InteropServices.ComTypes;
 using System;
-using System.Diagnostics;
 
 namespace CalculatorUITestFramework
 {

src/CalculatorUITestFramework/StandardAoTCalculatorPage.cs

@@ -1,10 +1,12 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 using Microsoft.VisualStudio.TestTools.UnitTesting;
+
 using OpenQA.Selenium;
 using OpenQA.Selenium.Appium;
 using OpenQA.Selenium.Appium.Windows;
 using OpenQA.Selenium.Interactions;
+
 using System.Drawing;
 
 namespace CalculatorUITestFramework

src/CalculatorUITestFramework/UnitConverterOperatorsPanel.cs

@@ -1,9 +1,6 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 using OpenQA.Selenium.Appium.Windows;
-using System;
-using System.Collections.Generic;
-using System.Text;
 
 namespace CalculatorUITestFramework
 {

src/CalculatorUITestFramework/UnitConverterPage.cs

@@ -1,9 +1,6 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 using OpenQA.Selenium.Appium.Windows;
-using System;
-using System.Collections.Generic;
-using System.Text;
 
 namespace CalculatorUITestFramework
 {

src/CalculatorUITestFramework/UnitConverterResults.cs

@@ -1,9 +1,9 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 using Microsoft.VisualStudio.TestTools.UnitTesting;
+
 using OpenQA.Selenium.Appium.Windows;
-using System;
+
-using OpenQA.Selenium.Interactions;
 using System.Text.RegularExpressions;
 
 namespace CalculatorUITestFramework

src/CalculatorUITestFramework/WinAppDriver.cs

@@ -2,10 +2,11 @@
 // Licensed under the MIT License.
 
 using Microsoft.VisualStudio.TestTools.UnitTesting;
+
 using OpenQA.Selenium.Appium;
 using OpenQA.Selenium.Appium.Windows;
+
 using System;
-using System.Diagnostics;
 
 namespace CalculatorUITestFramework
 {
@@ -41,7 +42,7 @@ public void SetupCalculatorSession(TestContext context)
             this.windowsDriverService.OutputDataReceived += (sender, e) =>
             {
                 var outputData = e.Data?.Replace("\0", string.Empty);
-                if (!String.IsNullOrEmpty(outputData))
+                if (!string.IsNullOrEmpty(outputData))
                 {
                     Console.WriteLine(outputData);
                 }

src/CalculatorUITestFramework/WindowsDriverLocalService.cs

@@ -24,10 +24,10 @@ namespace CalculatorUITestFramework
 {
     public class WindowsDriverLocalService : IDisposable
     {
-        private FileInfo FileName;
+        private readonly FileInfo FileName;
-        private string Arguments;
+        private readonly string Arguments;
-        private IPAddress IP;
+        private readonly IPAddress IP;
-        private int Port;
+        private readonly int Port;
         private TimeSpan InitializationTimeout;
         private Process Service;
 
@@ -119,11 +119,7 @@ public void Dispose()
             GC.SuppressFinalize(this);
         }
 
-        public Uri ServiceUrl
+        public Uri ServiceUrl => new Uri($"http://{this.IP}:{Convert.ToString(this.Port)}");
-        {
-            // Note: append /wd/hub to the URL if you're directing the test at Appium
-            get { return new Uri($"http://{this.IP}:{Convert.ToString(this.Port)}"); }
-        }
 
         private void DestroyProcess()
         {

src/CalculatorUITestFramework/WindowsDriverServiceBuilder.cs

@@ -39,11 +39,7 @@ public WindowsDriverLocalService Build()
 
         public WindowsDriverServiceBuilder WithFileInfo(FileInfo fileInfo)
         {
-            if (fileInfo == null)
+            this.FileInfo = fileInfo ?? throw new ArgumentNullException("FileInfo should not be NULL");
-            {
-                throw new ArgumentNullException("FileInfo should not be NULL");
-            }
-            this.FileInfo = fileInfo;
             return this;
         }
 

src/CalculatorUITestFramework/WindowsElementExtensions.cs

@@ -3,8 +3,9 @@
 
 using Microsoft.VisualStudio.TestTools.UnitTesting;
 using Microsoft.VisualStudio.TestTools.UnitTesting.Logging;
+
 using OpenQA.Selenium.Appium.Windows;
-using System;
+
 using System.Diagnostics;
 using System.Threading;
 

src/CalculatorUITests/CurrencyConverterFunctionalTests.cs

@@ -1,16 +1,15 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 using CalculatorUITestFramework;
+
 using Microsoft.VisualStudio.TestTools.UnitTesting;
-using OpenQA.Selenium;
-using System;
 
 namespace CalculatorUITests
 {
     [TestClass]
     public class CurrencyConverterFunctionalTests
     {
-        private static UnitConverterPage page = new UnitConverterPage();
+        private static readonly UnitConverterPage page = new UnitConverterPage();
 
         public TestContext TestContext { get; set; }
 
@@ -64,7 +63,7 @@ private string NormalizeCurrencyText(string realValue, int fractionDigits)
             }
             else
             {
-                parts[1] = parts[1].Substring(0, fractionDigits);
+                parts[1] = parts[1][..fractionDigits];
             }
 
             return $"{parts[0]}.{parts[1]}".TrimEnd('.');

src/CalculatorUITests/HistoryFunctionalTests.cs

@@ -2,9 +2,12 @@
 // Licensed under the MIT License.
 
 using CalculatorUITestFramework;
+
 using Microsoft.VisualStudio.TestTools.UnitTesting;
+
 using OpenQA.Selenium;
 using OpenQA.Selenium.Interactions;
+
 using System;
 
 namespace CalculatorUITests
@@ -12,7 +15,7 @@ namespace CalculatorUITests
     [TestClass]
     public class HistoryFunctionalTests
     {
-        private static StandardCalculatorPage page = new StandardCalculatorPage();
+        private static readonly StandardCalculatorPage page = new StandardCalculatorPage();
 
         /// <summary>
         /// Initializes the WinAppDriver web driver session.

src/CalculatorUITests/MemoryFunctionalTests.cs

@@ -2,9 +2,12 @@
 // Licensed under the MIT License.
 
 using CalculatorUITestFramework;
+
 using Microsoft.VisualStudio.TestTools.UnitTesting;
+
 using OpenQA.Selenium;
 using OpenQA.Selenium.Interactions;
+
 using System;
 
 namespace CalculatorUITests
@@ -12,7 +15,7 @@ namespace CalculatorUITests
     [TestClass]
     public class MemoryFunctionalTests
     {
-        private static StandardCalculatorPage page = new StandardCalculatorPage();
+        private static readonly StandardCalculatorPage page = new StandardCalculatorPage();
 
         /// <summary>
         /// Initializes the WinAppDriver web driver session.

src/CalculatorUITests/ProgrammerModeFunctionalTests.cs

@@ -2,8 +2,11 @@
 // Licensed under the MIT License.
 
 using CalculatorUITestFramework;
+
 using Microsoft.VisualStudio.TestTools.UnitTesting;
+
 using OpenQA.Selenium;
+
 using System;
 
 namespace CalculatorUITests
@@ -11,7 +14,7 @@ namespace CalculatorUITests
     [TestClass]
     public class ProgrammerModeFunctionalTests
     {
-        private static ProgrammerCalculatorPage page = new ProgrammerCalculatorPage();
+        private static readonly ProgrammerCalculatorPage page = new ProgrammerCalculatorPage();
 
         /// <summary>
         /// Initializes the WinAppDriver web driver session.
@@ -637,7 +640,7 @@ public void Logical_Operator_Binary_RightShift()
             page.ProgrammerOperators.RightShiftLogicalButton.Click();
             page.StandardOperators.NumberPad.Input(1);
             page.StandardOperators.EqualButton.Click();
-            Assert.IsTrue(String.Equals(page.CalculatorResults.GetCalculatorResultText(), "0 1 1 1  1 1 1 1  1 1 1 1  1 1 1 1  1 1 1 1  1 1 1 1  1 1 1 1  1 1 1 1  1 1 1 1  1 1 1 1  1 1 1 1  1 1 1 1  1 1 1 1  1 1 1 1  1 1 1 1  1 0 1 1", StringComparison.OrdinalIgnoreCase));
+            Assert.IsTrue(string.Equals(page.CalculatorResults.GetCalculatorResultText(), "0 1 1 1  1 1 1 1  1 1 1 1  1 1 1 1  1 1 1 1  1 1 1 1  1 1 1 1  1 1 1 1  1 1 1 1  1 1 1 1  1 1 1 1  1 1 1 1  1 1 1 1  1 1 1 1  1 1 1 1  1 0 1 1", StringComparison.OrdinalIgnoreCase));
         }
 
         /// <summary>

src/CalculatorUITests/ScientificModeFunctionalTests.cs

@@ -2,18 +2,15 @@
 // Licensed under the MIT License.
 
 using CalculatorUITestFramework;
+
 using Microsoft.VisualStudio.TestTools.UnitTesting;
-using OpenQA.Selenium;
-using OpenQA.Selenium.Appium.Windows;
-using System;
-using System.Collections.Generic;
 
 namespace CalculatorUITests
 {
     [TestClass]
     public class ScientificModeFunctionalTests
     {
-        private static ScientificCalculatorPage page = new ScientificCalculatorPage();
+        private static readonly ScientificCalculatorPage page = new ScientificCalculatorPage();
 
         /// <summary>
         /// Initializes the WinAppDriver web driver session.

src/CalculatorUITests/StandardModeFunctionalTests.cs

@@ -2,8 +2,11 @@
 // Licensed under the MIT License.
 
 using CalculatorUITestFramework;
+
 using Microsoft.VisualStudio.TestTools.UnitTesting;
+
 using OpenQA.Selenium;
+
 using System;
 using System.Text.RegularExpressions;
 
@@ -12,7 +15,7 @@ namespace CalculatorUITests
     [TestClass]
     public class StandardModeFunctionalTests
     {
-        private static StandardCalculatorPage page = new StandardCalculatorPage();
+        private static readonly StandardCalculatorPage page = new StandardCalculatorPage();
 
         /// <summary>
         /// Initializes the WinAppDriver web driver session.