/// <summary>

/// 发送UDP消息

/// </summary>

/// <param name="msg">消息内容</param>

void Send(string msg)

{

    UdpClient udpClient = new UdpClient();

    IPEndPoint ipEndPoint = new IPEndPoint(IPAddress.Broadcast, );

    byte[] buffer = Encoding.UTF8.GetBytes(msg);

    udpClient.Send(buffer, buffer.Length, ipEndPoint);

}

static void Main()

{

    UdpClient udpServer = new UdpClient();

    IPEndPoint ipEndPoint = new IPEndPoint(IPAddress.Any, );

    udpServer.BeginReceive(Received, udpServer);

}

/// <summary>
/// 异步接收UDP数据
/// </summary>
/// <param name="iar"></param>
void Received(IAsyncResult iar)
{
　　udpServer = iar.AsyncState as UdpClient;
　　byte[] buffer = udpServer.EndReceive(iar, ref ipEndPoint);

　　//将获取的byte[]数据转换成字符串
　　string m = Encoding.UTF8.GetString(buffer).Trim();

　　Console.WriteLine("Receive:{0}",m);

　　//继续异步接收数据
　　udpServer.BeginReceive(Received, udpServer);
}