非常简单的UDP通信程序,C#

using System;using System.Net;using System.Net.Sockets;using System.Text;public class UDPListener{private const int listenPort = 11000;private static void StartListener(){bool done = false;UdpClient listener = new UdpClient(listenPort);IPEndPoint groupEP = new IPEndPoint(IPAddress.Any,listenPort);try{while (!done){Console.WriteLine("Waiting for broadcast");byte[] bytes = listener.Receive( ref groupEP);Console.WriteLine("Received broadcast from {0} :\n {1}\n",groupEP.ToString(),Encoding.ASCII.GetString(bytes,0,bytes.Length));}}catch (Exception e){Console.WriteLine(e.ToString());}finally{listener.Close();}}public static int Main(){StartListener();return 0;}}//////////////using System;using System.Net;using System.Net.Sockets;using System.Text;class Program {    static void Main(string[] args)     {        Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Dgram,            ProtocolType.Udp);        IPAddress broadcast = IPAddress.Parse("192.168.1.255");        byte[] sendbuf = Encoding.ASCII.GetBytes(args[0]);        IPEndPoint ep = new IPEndPoint(broadcast, 11000);        s.SendTo(sendbuf, ep);        Console.WriteLine("Message sent to the broadcast address");    }}