c# udp的问题

在编码过程中发现这一段代码有错误

        /// </summary>
        private void DoListen()
        {
            bytData = new byte[intMaxDataSize];
            epRemote = (EndPoint)(new IPEndPoint(IPAddress.Any, 8000));

            //可能会抛出一个异常
            while (true)
            {
                if (LocalSocket.Poll(5000, SelectMode.SelectRead))
                {//每5ms查询一下网络，如果有可读数据就接收
                    LocalSocket.BeginReceiveFrom(bytData, 0, bytData.Length, SocketFlags.None, ref epRemote, new AsyncCallback(ReceiveData), null);
                }
            }
        }

        /// <summary>
        /// 接收数据
        /// </summary>
        /// <param name="iar"></param>
        private void ReceiveData(IAsyncResult iar)
        {
            int intRecv = 0;
            try
            {
                intRecv = LocalSocket.EndReceiveFrom(iar, ref epRemote);
            }
            catch
            {
                throw new Exception();
            }
            if (intRecv > 0)
            {
                byte[] bytReceivedData = new byte[intRecv];
                Buffer.BlockCopy(bytData, 0, bytReceivedData, 0, intRecv);
                voicecapture1.GetVoiceData(intRecv, bytReceivedData);//调用声音模块中的GetVoiceData来从字节数组中获取声音并播放
            }
        }

我做的是p2p语音通讯不知道为什么这里会出错                     LocalSocket.BeginReceiveFrom(bytData, 0, bytData.Length, SocketFlags.None, ref epRemote, new AsyncCallback(ReceiveData), null);
远程计算机主机关闭连接。不懂怎么回事。两边都出错。两边都没有关闭连接啊，为什么说远程关闭连接 --------------------编程问答-------------------- 但是如果接收端没有读完数据就提前关闭了连接，发送端就会异常。查看接收端的缓冲大小 --------------------编程问答-------------------- 这个解决了类似udp断开问题:
http://topic.csdn.net/u/20080119/15/6e934e42-2378-491d-bf90-4affa7d7c0ee.html

补充：.NET技术 ,  C#