public void Start()
        {
            if (client != null)
            {
                return;
            }

            client = new CommUtil.Tcp.TcpClient(serverAddress, serverPort);
            client.Start();

            RaiseEnabledPropertiesChanged();
        }
        public void Stop()
        {
            if (client == null)
            {
                return;
            }

            client.Stop();
            client = null;

            RaiseEnabledPropertiesChanged();
        }
    public void Stop()
    {
      if(client == null) return;

      client.Stop();
      client = null;

      RaiseEnabledPropertiesChanged();
    }
    public void Start()
    {
      if(client != null) return;
      
      client = new CommUtil.Tcp.TcpClient(serverAddress, serverPort);
      client.Start();

      RaiseEnabledPropertiesChanged();
    }