/// <summary>
 /// 断开与服务器的连接
 /// </summary>
 private void CloseConnectionWithServer()
 {
     //先关闭和数据库的连接
     ConnHelper.CloseConnetcion(MysqlConn);
     if (_clientSocket != null)
     {
         //关闭与服务器的连接,并从服务器连接客户端列表中移除
         _clientSocket.Close();
         _currentServer.RemoveClientFromClientList(this);
     }
     if (currentEnteredRoom != null)
     {
         //移除该Client的房间
         currentEnteredRoom.Close(this);
     }
 }