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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net.Sockets;
using System.Net;

namespace TestEthernet
{
    class Program
    {
        static void Main(string[] args)
        {
            UdpClient udp = new UdpClient();

            int GroupPort = 15000;



            //IPEndPoint groupEP = new IPEndPoint(IPAddress.Parse("192.168.98.98"), GroupPort);
            IPEndPoint groupEP = new IPEndPoint(IPAddress.Broadcast, GroupPort);



            string str4 = "Is anyone out there?";

            byte[] sendBytes4 = Encoding.ASCII.GetBytes(str4);


            for (int i = 0; i <= 10000; )
                udp.Send(sendBytes4, sendBytes4.Length, groupEP);


            byte[] receiveBytes = udp.Receive(ref groupEP);

            string returnData = Encoding.ASCII.GetString(receiveBytes);

        }
    }
}