C# Socket 网络编程 聊天程序

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         /// <summary>
        /// 启动
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void butStart_Click(object sender, EventArgs e)
        {
            //1、创建Socket对象
            Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

            //2、绑定端口IP
            socket.Bind(new IPEndPoint(IPAddress.Parse(txtIP.Text), int.Parse(txtPort.Text)));

            //3、开启侦听
            socket.Listen(10);   //连接等待队列

            //4、开始接受客户端的连接
            ThreadPool.QueueUserWorkItem(new WaitCallback (this.AcceptClientConnect),socket);
            
        }

你先确定绑定的IP地址有效（ping...），然后尝试这个。https://www.cnblogs.com/maanshancss/p/11533062.html

IP用默认的就行 127.0.0.1