贴上客户端代码：

private TcpClient ConnectToServer()
        {
            try
            {
                //Connect To Server
                TcpClient client = new TcpClient();
                
                IPHostEntry host = Dns.GetHostEntry(this.textBoxIP.Text.Trim());

                IPAddress[] dd = host.AddressList;
                var address = (from h in host.AddressList where h.AddressFamily == AddressFamily.InterNetwork select h).First();
                
                client.Connect(address.ToString(),Convert.ToInt32(this.textBoxPort.Text.Trim()));

                return client;
            }
            catch (SocketException ex)
            {
                MessageBox.Show(ex.Message);
                return null;
            }

在我本地（127.0.0.1）是可以的，到别人电脑上，服务器改为我的就报错！