Someone

using System.Threading;
using System;
using System.Net.Sockets;
using System.Net;

namespace ConsoleApplication3
{
    class Program
    {
        static void Main(string[] args)
        {
            Thread s = new Thread(new ThreadStart(WontDie));
            s.IsBackground = true;
            s.Start();
            System.Threading.Thread.Sleep(1000);
            Console.WriteLine("Exiting");
        }

        private static void WontDie()
        {
            while (true)
            {
                IPEndPoint endpoint = new IPEndPoint(IPAddress.Parse("239.255.255.250"), 1900);
                UdpClient s = new UdpClient();
                byte[] buffer = new byte[1024];
                s.Send(buffer, buffer.Length, endpoint);
                s.Receive(ref endpoint);
            }
        }
    }
}