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

public class Advertise {
   public static void Main()
   {
      Advertise server = new Advertise();
   }

   public Advertise()
   {
      Thread advert = new Thread(new ThreadStart(sendPackets));
      advert.IsBackground = true;
      advert.Start();
      Console.Write("Press Enter to stop");
      string data = Console.ReadLine();
   }

   void sendPackets()
   {
      Socket sock = new Socket(AddressFamily.InterNetwork,
                      SocketType.Dgram, ProtocolType.Udp);
      sock.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.Broadcast, 1);
      IPEndPoint iep = new IPEndPoint(IPAddress.Broadcast, 9050);

      string hostname = Dns.GetHostName();
      byte[] data = Encoding.ASCII.GetBytes(hostname);
      while (true)
      {
         sock.SendTo(data, iep);
         Thread.Sleep(60000);
      }
   }
}