[Modify] Rename it

websocket-sharp/Ext.cs

@@ -1501,7 +1501,7 @@ namespace WebSocketSharp
     /// <exception cref="ArgumentException">
     /// <paramref name="protocol"/> is an empty string.
     /// </exception>
-    public static bool IsUpgradeTo (
+    public static bool IsUpgradeRequest (
       this HttpListenerRequest request, string protocol
     )
     {

websocket-sharp/Server/HttpServer.cs

@@ -944,7 +944,7 @@ namespace WebSocketSharp.Server
           ThreadPool.QueueUserWorkItem (
             state => {
               try {
-                if (ctx.Request.IsUpgradeTo ("websocket")) {
+                if (ctx.Request.IsUpgradeRequest ("websocket")) {
                   processRequest (ctx.AcceptWebSocket (null));
                   return;
                 }