c# udpclient 的recv时间问题

UdpClient sender = new UdpClient();

--sender.Client.ReceiveTimeout = 0;

--sender.Client.ReceiveTimeout = -1;

--sender.Client.ReceiveTimeout = 1;

sender.Receive(ref remoteEP);

ReceiveTimeout设置为0和-1 貌似会无限等待下去
即使设置为1 我在Receive前后输出时间 耗时也很长 (大概500ms)

有什么办法可以类似c++的recv异步 有没有数据都立即返回 不等待呢？

PS：类似BeginReceive的异步方法不太适合我的需求 就不要提了
------解决方案--------------------
直接用Socket多好啊，没这个问题

using System;

using System.Threading;

using System.Net;

using System.Net.Sockets;





namespace GDPreAlarm

{

	/// <summary>

	/// clsUdp 的摘要说明。

	/// </summary>

	public class clsUdpSetParam

	{

		private Socket m_udp = null;

	

		private AsyncCallback receiveCallback = null;

		private EndPoint remoteEP = null;

		private byte []buff=null;

		

		public delegate void RecievedDataHandler(EndPoint ep,string strMessage);

		public event RecievedDataHandler RecievedData;



		internal clsUdpSetParam()

		{

			//

			// TODO: 在此处添加构造函数逻辑

			//

			

		}



	/// <summary>

	/// 接收线程

	/// </summary>

	/// <param name="ar"></param>

		internal void OnDataReceived(IAsyncResult ar)

		{

			if(m_udp==null)

				return;

			try

			{

				Socket udpSocket = ar.AsyncState as Socket;

				if(m_udp==null)

					return;



				int bytesRecved = udpSocket.EndReceiveFrom(ar, ref remoteEP);

				lock(this)

				{

					

					string strData=System.Text.Encoding.Default.GetString(buff);

					strData=strData.TrimEnd('\0');

					if(RecievedData!=null)

					{

						RecievedData(remoteEP,strData);

					}

					for(int i=0;i<buff.Length;i++)

					{

						buff[i]=(byte)'\0';

					}

				}

			}

			catch(Exception ex)

			{

							}

			finally

			{

			

				if(m_udp!=null)

				{

					try

					{

						m_udp.BeginReceiveFrom(buff, 0, buff.Length, SocketFlags.None,

							ref remoteEP, receiveCallback, m_udp);



					}

					catch

					{

					}

				}

			}

		}

		public void Init()

		{

			buff=new byte[512];

			IPEndPoint localIpEndPoint = new IPEndPoint(IPAddress.Parse(global.g_ServerToUpload.IP),global.g_ServerToUpload.Port);

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

			if(m_udp!=null)

			{

				m_udp.Close();

				m_udp=null;

			}

			m_udp = new Socket(AddressFamily.InterNetwork,

				SocketType.Dgram, ProtocolType.Udp);



			receiveCallback = new AsyncCallback(OnDataReceived);



			m_udp.Bind(localIpEndPoint);



		}



		public void UnInit()

		{

			if(m_udp!=null)

			{

				m_udp.Close();

				m_udp=null;

			}

		}



		public bool SetParam(string strParam,EndPoint epClient)

		{

			if(m_udp==nu