void GetNewMessage()
 {
     readingData = null;
     ClientHandler.BeginReceive(buffer, 0, SocketListenerConnection.BufferSize, 0,
                                new AsyncCallback(ReadCallback), this);
 }
 void GetMoreData()
 {
     ClientHandler.BeginReceive(buffer, 0, SocketListenerConnection.BufferSize, 0,
                                new AsyncCallback(ReadCallback), this);
 }