C#UDP通讯UdpClient

远程主机强迫关闭了一个现有的连接 红色部分很重要

class UdpClientClass    {        /// <summary>        /// 构建客户端        /// </summary>        /// <param name="servierIpAddress">服务器iP地址或者域名</param>        /// <param name="sevierPort">服务器监听端口</param>        /// <param name="locadPort">本地监听端口</param>        /// <param name="timeOut">超时等待时间</param>        public UdpClientClass(string servierIpAddress, int sevierPort, int locadPort, int timeOut)        {            if (FpHelper.CheckIpAddress(ref servierIpAddress) == true)            {                try                {                    ServerIPE = new IPEndPoint(IPAddress.Parse(servierIpAddress), sevierPort);                    UdpListenClient = new UdpClient(locadPort);//固定通信端口                    UdpListenClient.Client.ReceiveTimeout = 3000;                    const long IOC_IN = 0x80000000;                    const long IOC_VENDOR = 0x18000000;                    const long SIO_UDP_CONNRESET = IOC_IN | IOC_VENDOR | 12;                    byte[] optionInValue = { Convert.ToByte(false) };                    byte[] optionOutValue = new byte[4];                    UdpListenClient.Client.IOControl((IOControlCode)SIO_UDP_CONNRESET, optionInValue, optionOutValue);                                   }                catch (System.Exception ex)                {                    MessageBox.Show("绑定端口失败" + ex.Message.ToString());                }            }        }        /// <summary>        /// UDP发送类，绑定了一个固定的端口        /// </summary>        private static UdpClient UdpListenClient;        public event EventHandler MessageChanged;        /// <summary>        /// 接收到服务器消息改变后触发的事件        /// </summary>        /// <param name="user"></param>        public void OnMessageChanged(UdpClientClass fp)        {            if (MessageChanged != null)            {                MessageChanged(fp, null);            }        }        /// <summary>        /// 服务器端的IP与端口        /// </summary>        private IPEndPoint ServerIPE = null;        bool IsReceiving = false;        public void Send(byte[] data, int len)        {          int len1 =  UdpListenClient.Send(data, len, ServerIPE);            if (!IsReceiving)                StartAndLsn();        }        private Thread ClientRecThread;        private void StartAndLsn()        {            IsReceiving = true;            ClientRecThread = new Thread(new ThreadStart(RecF));//启动新线程做接收            ClientRecThread.IsBackground = true;            ClientRecThread.Start();        }//启动并且 监听 服务器发来的数据        private void RecF()//接收数据做服务        {            byte[] btRec = null;            while (IsReceiving)            {                IPEndPoint remoteIPE = new IPEndPoint(IPAddress.Any, 0);                btRec = UdpListenClient.Receive(ref remoteIPE);//UDP接收数据                if (btRec.Length > 0 && remoteIPE.Address == ServerIPE.Address)//只处理特定的服务端的数据                {                    System.Windows.Forms.MessageBox.Show("res");                }                else                {                }            }        }//循环接收数据    }