public class StateObject

    {

        //服务器端

        public Socket udpServer = null;

        //接受数据缓冲区

        public byte[] buffer = new byte[10*1024];

        //远程终端

        public EndPoint remoteEP;



        public bool flag = false;

    }

  private void ServerForm_Load(object sender, EventArgs e)

        {

            StartServer startServer = new StartServer();

            thread = new Thread(new ThreadStart(startServer.ServerBind));

            thread.Start();

        }

        public void ServerBind()

        {

            //主机IP

            IPEndPoint serverIp = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 8686);

            Socket udpServer = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);

            udpServer.Bind(serverIp);

            IPEndPoint clientIp = new IPEndPoint(IPAddress.Any, 0);

            state = new StateObject();

            state.udpServer = udpServer;

            state.remoteEP = (EndPoint)clientIp;

            AsynRecive();

        }

        #endregion



        #region 异步接受消息

        public void AsynRecive()

        {

            lock (state)

            {

                state.udpServer.BeginReceiveFrom(state.buffer, 0, state.buffer.Length, SocketFlags.None, ref state.remoteEP,

                    new AsyncCallback(ReciveCallback), null);

                receiveDone.WaitOne();

            }

      &n