diff --git a/README.md b/README.md
index 0f21a886..6070215f 100644
--- a/README.md
+++ b/README.md
@@ -313,7 +313,7 @@ public class Chat : WebSocketService
 
 If you override the `WebSocketService.OnMessage (MessageEventArgs)` method, it's called when the `OnMessage` event of the `WebSocket` used by the current session in the WebSocket service occurs.
 
-And if you override the `WebSocketService.OnOpen ()`, `WebSocketService.OnError (ErrorEventArgs)`, and `WebSocketService.OnClose (CloseEventArgs)` methods, each of them is called when each event of the `WebSocket` (the `OnOpen`, `OnError`, and `OnClose`) occurs.
+And if you override the `WebSocketService.OnOpen ()`, `WebSocketService.OnError (ErrorEventArgs)`, and `WebSocketService.OnClose (CloseEventArgs)` methods, each of them is called when each event of the `WebSocket` (the `OnOpen`, `OnError`, and `OnClose` events) occurs.
 
 The `WebSocketService.Send` method sends a data to the client on the current session in the WebSocket service.
 
@@ -510,7 +510,7 @@ Could you access to [http://localhost:4649](http://localhost:4649) to do **WebSo
 
 ## Supported WebSocket Specifications ##
 
-websocket-sharp supports **[RFC 6455][rfc6455]** and is based on the following WebSocket references.
+websocket-sharp supports **[RFC 6455][rfc6455]**, and it's based on the following WebSocket references.
 
 - **[The WebSocket Protocol][rfc6455]**
 - **[The WebSocket API][api]**
diff --git a/websocket-sharp/CloseStatusCode.cs b/websocket-sharp/CloseStatusCode.cs
index b358cf1a..d1ed651f 100644
--- a/websocket-sharp/CloseStatusCode.cs
+++ b/websocket-sharp/CloseStatusCode.cs
@@ -31,13 +31,13 @@ using System;
 namespace WebSocketSharp
 {
   /// <summary>
-  /// Contains the values of the status codes for the WebSocket connection closure.
+  /// Contains the values of the status code for the WebSocket connection closure.
   /// </summary>
   /// <remarks>
   ///   <para>
-  ///   The status codes for the WebSocket connection closure are defined in
-  ///   <see href="http://tools.ietf.org/html/rfc6455#section-7.4.1">RFC 6455</see>
-  ///   for the WebSocket protocol.
+  ///   The values of the status code are defined in
+  ///   <see href="http://tools.ietf.org/html/rfc6455#section-7.4">Section 7.4</see>
+  ///   of RFC 6455.
   ///   </para>
   ///   <para>
   ///   "Reserved value" must not be set as a status code in a close control frame by
diff --git a/websocket-sharp/CompressionMethod.cs b/websocket-sharp/CompressionMethod.cs
index b49315a8..f7054687 100644
--- a/websocket-sharp/CompressionMethod.cs
+++ b/websocket-sharp/CompressionMethod.cs
@@ -31,11 +31,11 @@ using System;
 namespace WebSocketSharp
 {
   /// <summary>
-  /// Contains the values of the compression methods used to compress the message on the WebSocket
+  /// Contains the values of the compression method used to compress the message on the WebSocket
   /// connection.
   /// </summary>
   /// <remarks>
-  /// The compression methods are defined in
+  /// The values of the compression method are defined in
   /// <see href="http://tools.ietf.org/html/draft-ietf-hybi-permessage-compression-09">Compression
   /// Extensions for WebSocket</see>.
   /// </remarks>
diff --git a/websocket-sharp/LogLevel.cs b/websocket-sharp/LogLevel.cs
index 487d3311..5c9fdfe2 100644
--- a/websocket-sharp/LogLevel.cs
+++ b/websocket-sharp/LogLevel.cs
@@ -31,7 +31,7 @@ using System;
 namespace WebSocketSharp
 {
   /// <summary>
-  /// Contains the values of the logging levels.
+  /// Contains the values of the logging level.
   /// </summary>
   public enum LogLevel
   {
diff --git a/websocket-sharp/WebSocketState.cs b/websocket-sharp/WebSocketState.cs
index 643b889c..67c2930c 100644
--- a/websocket-sharp/WebSocketState.cs
+++ b/websocket-sharp/WebSocketState.cs
@@ -34,7 +34,7 @@ namespace WebSocketSharp
   /// Contains the values of the state of the WebSocket connection.
   /// </summary>
   /// <remarks>
-  /// The state of the WebSocket connection is defined in
+  /// The values of the state are defined in
   /// <see href="http://www.w3.org/TR/websockets/#dom-websocket-readystate">The WebSocket
   /// API</see>.
   /// </remarks>