C#同步socket例子

using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.Net.Sockets;
namespace MyTCPListener
{
    class Program
    {
        const int nPort = 6262;
        static void Main(string[] args)
        {
            Socket client = null;
            Console.WriteLine("OK");
            TcpListener tl = new TcpListener(nPort);
            Console.WriteLine("Listening as {0}",tl.LocalEndpoint);
            tl.Start();
            do
            {
                if (tl.Pending())
                {
                    client = tl.AcceptSocket();
                    DateTime now = DateTime.Now;
                    string welcome = "Welcome at " + now.ToString("G") + "\n\r";
                    Byte[] byteWelcome = System.Text.Encoding.ASCII.GetBytes(welcome);
                    client.Send(byteWelcome, byteWelcome.Length, 0);
                }
               

            } while (true);
        }
    }
}