diff --git a/Example/bin/Debug/example.exe b/Example/bin/Debug/example.exe
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diff --git a/Example/bin/Debug/websocket-sharp.dll b/Example/bin/Debug/websocket-sharp.dll
index aeda642a..402caa84 100755
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diff --git a/Example/bin/Debug/websocket-sharp.dll.mdb b/Example/bin/Debug/websocket-sharp.dll.mdb
index 07b5cc4e..cc4c5305 100644
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diff --git a/Example/bin/Debug_Ubuntu/example.exe b/Example/bin/Debug_Ubuntu/example.exe
index 52790d8d..298f55b0 100755
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diff --git a/Example/bin/Debug_Ubuntu/example.exe.mdb b/Example/bin/Debug_Ubuntu/example.exe.mdb
index 637dabb9..7fc4f001 100644
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diff --git a/Example/bin/Debug_Ubuntu/websocket-sharp.dll b/Example/bin/Debug_Ubuntu/websocket-sharp.dll
index 823848b9..f739bedf 100755
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diff --git a/Example/bin/Debug_Ubuntu/websocket-sharp.dll.mdb b/Example/bin/Debug_Ubuntu/websocket-sharp.dll.mdb
index 727ed67b..1d740178 100644
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diff --git a/Example/bin/Release/example.exe b/Example/bin/Release/example.exe
index 4f431779..f2e357ef 100755
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diff --git a/Example/bin/Release/websocket-sharp.dll b/Example/bin/Release/websocket-sharp.dll
index 238a1f07..87c67760 100755
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diff --git a/Example/bin/Release_Ubuntu/example.exe b/Example/bin/Release_Ubuntu/example.exe
index 584333aa..eed18a11 100755
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diff --git a/Example/bin/Release_Ubuntu/websocket-sharp.dll b/Example/bin/Release_Ubuntu/websocket-sharp.dll
index 06dd2af4..98343484 100755
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diff --git a/Example1/bin/Debug/example1.exe b/Example1/bin/Debug/example1.exe
index b671fe67..d23d720d 100755
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diff --git a/Example1/bin/Debug/example1.exe.mdb b/Example1/bin/Debug/example1.exe.mdb
index 9b2d1986..172e10d0 100644
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index aeda642a..402caa84 100755
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index 07b5cc4e..cc4c5305 100644
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diff --git a/Example1/bin/Debug_Ubuntu/example1.exe b/Example1/bin/Debug_Ubuntu/example1.exe
index d0245a21..56633848 100755
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diff --git a/Example1/bin/Debug_Ubuntu/example1.exe.mdb b/Example1/bin/Debug_Ubuntu/example1.exe.mdb
index 6896e170..c4d26f13 100644
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index 823848b9..f739bedf 100755
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diff --git a/Example1/bin/Release/example1.exe b/Example1/bin/Release/example1.exe
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diff --git a/Example1/bin/Release_Ubuntu/example1.exe b/Example1/bin/Release_Ubuntu/example1.exe
index aef4eb3f..9e540405 100755
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index 06dd2af4..98343484 100755
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diff --git a/Example2/bin/Debug/example2.exe b/Example2/bin/Debug/example2.exe
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diff --git a/Example2/bin/Debug/example2.exe.mdb b/Example2/bin/Debug/example2.exe.mdb
index 6ffbd10f..b703faf8 100644
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diff --git a/Example2/bin/Debug/websocket-sharp.dll b/Example2/bin/Debug/websocket-sharp.dll
index aeda642a..402caa84 100755
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index 07b5cc4e..cc4c5305 100644
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diff --git a/Example2/bin/Debug_Ubuntu/example2.exe b/Example2/bin/Debug_Ubuntu/example2.exe
index f58f496a..9dcca51a 100755
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diff --git a/Example2/bin/Debug_Ubuntu/example2.exe.mdb b/Example2/bin/Debug_Ubuntu/example2.exe.mdb
index 972fa64e..6b8ffcfa 100644
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diff --git a/Example2/bin/Debug_Ubuntu/websocket-sharp.dll b/Example2/bin/Debug_Ubuntu/websocket-sharp.dll
index 823848b9..f739bedf 100755
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diff --git a/Example2/bin/Debug_Ubuntu/websocket-sharp.dll.mdb b/Example2/bin/Debug_Ubuntu/websocket-sharp.dll.mdb
index 727ed67b..1d740178 100644
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diff --git a/Example2/bin/Release/example2.exe b/Example2/bin/Release/example2.exe
index 0ca1be63..c71869f0 100755
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diff --git a/Example2/bin/Release/websocket-sharp.dll b/Example2/bin/Release/websocket-sharp.dll
index 238a1f07..87c67760 100755
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diff --git a/Example2/bin/Release_Ubuntu/example2.exe b/Example2/bin/Release_Ubuntu/example2.exe
index 61fc7660..5771ba47 100755
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diff --git a/Example2/bin/Release_Ubuntu/websocket-sharp.dll b/Example2/bin/Release_Ubuntu/websocket-sharp.dll
index 06dd2af4..98343484 100755
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diff --git a/Example3/Example3.csproj b/Example3/Example3.csproj
index cfb81b7b..ddcf431f 100644
--- a/Example3/Example3.csproj
+++ b/Example3/Example3.csproj
@@ -49,7 +49,6 @@
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="System" />
-    <Reference Include="System.Configuration" />
   </ItemGroup>
   <ItemGroup>
     <Compile Include="AssemblyInfo.cs" />
diff --git a/Example3/Example3.pidb b/Example3/Example3.pidb
index 162891a4..c44355fb 100644
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diff --git a/Example3/Program.cs b/Example3/Program.cs
index 491dbecd..1bb1b2f6 100644
--- a/Example3/Program.cs
+++ b/Example3/Program.cs
@@ -1,7 +1,4 @@
 using System;
-using System.Configuration;
-using System.IO;
-using System.Text;
 using WebSocketSharp;
 using WebSocketSharp.Net;
 using WebSocketSharp.Server;
diff --git a/Example3/bin/Debug/Example3.exe b/Example3/bin/Debug/Example3.exe
index f4c2e510..9a93ccb9 100755
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diff --git a/Example3/bin/Debug/Example3.exe.mdb b/Example3/bin/Debug/Example3.exe.mdb
index 29cb9a46..60c046f2 100644
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diff --git a/Example3/bin/Debug/websocket-sharp.dll b/Example3/bin/Debug/websocket-sharp.dll
index aeda642a..402caa84 100755
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diff --git a/Example3/bin/Debug/websocket-sharp.dll.mdb b/Example3/bin/Debug/websocket-sharp.dll.mdb
index 07b5cc4e..cc4c5305 100644
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diff --git a/Example3/bin/Debug_Ubuntu/Example3.exe b/Example3/bin/Debug_Ubuntu/Example3.exe
index ebe94ea0..e2a9166d 100755
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diff --git a/Example3/bin/Debug_Ubuntu/Example3.exe.mdb b/Example3/bin/Debug_Ubuntu/Example3.exe.mdb
index 35d44e59..c726f09d 100644
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diff --git a/Example3/bin/Debug_Ubuntu/websocket-sharp.dll b/Example3/bin/Debug_Ubuntu/websocket-sharp.dll
index 823848b9..f739bedf 100755
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diff --git a/Example3/bin/Debug_Ubuntu/websocket-sharp.dll.mdb b/Example3/bin/Debug_Ubuntu/websocket-sharp.dll.mdb
index 727ed67b..1d740178 100644
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diff --git a/Example3/bin/Release/Example3.exe b/Example3/bin/Release/Example3.exe
index 5bf7c26b..8f678353 100755
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diff --git a/Example3/bin/Release/websocket-sharp.dll b/Example3/bin/Release/websocket-sharp.dll
index 238a1f07..87c67760 100755
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diff --git a/Example3/bin/Release_Ubuntu/Example3.exe b/Example3/bin/Release_Ubuntu/Example3.exe
index f3e6951a..efec7611 100755
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diff --git a/Example3/bin/Release_Ubuntu/websocket-sharp.dll b/Example3/bin/Release_Ubuntu/websocket-sharp.dll
index 06dd2af4..98343484 100755
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diff --git a/websocket-sharp/Server/HttpServer.cs b/websocket-sharp/Server/HttpServer.cs
index 4de1eac4..415096f1 100644
--- a/websocket-sharp/Server/HttpServer.cs
+++ b/websocket-sharp/Server/HttpServer.cs
@@ -126,26 +126,47 @@ namespace WebSocketSharp.Server {
       _rootPath = ConfigurationManager.AppSettings["RootPath"];
     }
 
+    private bool isUpgrade(HttpListenerRequest request, string value)
+    {
+      if (!request.Headers.Exists("Upgrade", value))
+        return false;
+
+      if (!request.Headers.Exists("Connection", "Upgrade"))
+        return false;
+
+      return true;
+    }
+
     private void respond(HttpListenerContext context)
     {
       WaitCallback respondCb = (state) =>
       {
+        var req = context.Request;
+        var res = context.Response;
+
         try
         {
-          if (context.Request.IsWebSocketRequest)
+          if (isUpgrade(req, "websocket"))
           {
-            upgradeToWebSocket(context);
+            if (req.IsWebSocketRequest)
+            {
+              upgradeToWebSocket(context);
+              return;
+            }
+
+            res.StatusCode = (int)HttpStatusCode.BadRequest;
           }
           else
           {
             respondToClient(context);
-            context.Response.Close();
           }
         }
         catch (Exception ex)
         {
           OnError.Emit(this, new ErrorEventArgs(ex.Message));
         }
+
+        res.Close();
       };
       ThreadPool.QueueUserWorkItem(respondCb);
     }
@@ -236,6 +257,9 @@ namespace WebSocketSharp.Server {
     public byte[] GetFile(string path)
     {
       var filePath = _rootPath + path;
+    #if WINDOWS
+      filePath = filePath.Replace("/", "\\");
+    #endif
       if (File.Exists(filePath))
         return File.ReadAllBytes(filePath);
 
diff --git a/websocket-sharp/bin/Debug/websocket-sharp.dll b/websocket-sharp/bin/Debug/websocket-sharp.dll
index aeda642a..402caa84 100755
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diff --git a/websocket-sharp/bin/Debug/websocket-sharp.dll.mdb b/websocket-sharp/bin/Debug/websocket-sharp.dll.mdb
index 07b5cc4e..cc4c5305 100644
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diff --git a/websocket-sharp/bin/Debug_Ubuntu/websocket-sharp.dll b/websocket-sharp/bin/Debug_Ubuntu/websocket-sharp.dll
index 823848b9..f739bedf 100755
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diff --git a/websocket-sharp/bin/Debug_Ubuntu/websocket-sharp.dll.mdb b/websocket-sharp/bin/Debug_Ubuntu/websocket-sharp.dll.mdb
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diff --git a/websocket-sharp/bin/Release/websocket-sharp.dll b/websocket-sharp/bin/Release/websocket-sharp.dll
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index 06dd2af4..98343484 100755
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diff --git a/websocket-sharp/websocket-sharp.pidb b/websocket-sharp/websocket-sharp.pidb
index 9dca2fc0..cce584d6 100644
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