[转][C#]手写 Socket 服务端

private void OpenSocket(int port)
{
    Task.Factory.StartNew(() =>
    {
        server = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
        IPEndPoint local = new IPEndPoint(IPAddress.Parse("127.1"), port);
        server.Bind(local);
        server.Listen(10);

        Invoke((MethodInvoker)delegate
        {
            button1.BackColor = Color.ForestGreen;
        });
        while (true)
        {
            Socket client = server.Accept();
            byte[] buffer = new byte[1024];
            int bytes = client.Receive(buffer, buffer.Length, SocketFlags.None);

            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < bytes; i++)
            {
                sb.AppendFormat("{0} ", buffer[i].ToString("x2"));
            }

            Invoke((MethodInvoker)delegate
            {
                string filePath = AppDomain.CurrentDomain.BaseDirectory.TrimEnd('\\') + "\\log.txt";
                string str = string.Format("\r\n{0} 接收到来自 {1} 的消息：{2}\r\n{3} 发送到：{4}",
                    DateTime.Now.ToString("HH:mm"),
                    client.RemoteEndPoint,
                    Encoding.ASCII.GetString(buffer, 0, bytes),
                    sb.ToString(),
                    client.LocalEndPoint);
                File.AppendAllText(filePath, str);
                textBox1.Text += str;
                Application.DoEvents();
            });

            client.Send(new byte[] { (byte)'O', (byte)'K' }, 0);
            client.Close();
        }
    }).ContinueWith((task) => {
        if(task.Exception !=null)
        Invoke((MethodInvoker)delegate
        {                    
            textBox1.Text += "\r\n错误："+ task.Exception.InnerException.Message;
        });  
    });
}

Task 异常处理可以参考：https://www.cnblogs.com/tianma3798/p/7003862.html