[Modify] Replace it

websocket-sharp/Server/HttpServer.cs

@@ -1061,18 +1061,13 @@ namespace WebSocketSharp.Server
     /// </summary>
     public void Start ()
     {
-      lock (_sync) {
+      var msg = checkIfCertificateExists ();
-        var msg = _state.CheckIfAvailable (true, false, false) ?? checkIfCertificateExists ();
       if (msg != null) {
         _log.Error (msg);
         return;
       }
 
-        _services.Start ();
+      start ();
-        startReceiving ();
-
-        _state = ServerState.Start;
-      }
     }
 
     /// <summary>