问正在使用的多播侦听器端口

EN

private static void ReceiveMulticastMessages()
{
    var groupEndPoint = new IPEndPoint(IPAddress.Parse("238.8.8.8"), 23888);
    var localEndPoint = new IPEndPoint(IPAddress.Any, 23888);

    using (var udpClient = new UdpClient())
    {
        udpClient.Client.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
        udpClient.Client.Bind(localEndPoint);
        udpClient.JoinMulticastGroup(groupEndPoint.Address, localEndPoint.Address);

        while (true)
        {
            var remoteEndPoint = new IPEndPoint(IPAddress.Any, 0);
            var bytes = udpClient.Receive(ref remoteEndPoint);
            var message = Encoding.ASCII.GetString(bytes);
            Console.WriteLine(message);
        }
    }
}