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();

        Invoke((MethodInvoker)delegate

        {

            button1.BackColor = Color.ForestGreen;

        });

        while (true)

        {

            Socket client = server.Accept();

            byte[] buffer = new byte[];

            int bytes = client.Receive(buffer, buffer.Length, SocketFlags.None);

            StringBuilder sb = new StringBuilder();

            for (int i = ; 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, , bytes),

                    sb.ToString(),

                    client.LocalEndPoint);

                File.AppendAllText(filePath, str);

                textBox1.Text += str;

                Application.DoEvents();

            });

            client.Send(new byte[] { (byte)'O', (byte)'K' }, );

            client.Close();

        }

    }).ContinueWith((task) => {

        if(task.Exception !=null)

        Invoke((MethodInvoker)delegate

        {

            textBox1.Text += "\r\n错误："+ task.Exception.InnerException.Message;

        });

    });

}