Unified the ways of message thread in WebSocket.cs

Example/Program.cs

@@ -73,9 +73,9 @@ namespace Example
 
       ThreadPool.QueueUserWorkItem(notifyMsg);
 
-      //using (WebSocket ws = new WebSocket("ws://echo.websocket.org", "echo"))
+      using (WebSocket ws = new WebSocket("ws://echo.websocket.org", "echo"))
       //using (WebSocket ws = new WebSocket("wss://echo.websocket.org", "echo"))
-      using (WebSocket ws = new WebSocket("ws://localhost:4649"))
+      //using (WebSocket ws = new WebSocket("ws://localhost:4649"))
       {
         ws.OnOpen += (sender, e) =>
         {