Csharp/CSharp Tutorial/Network/Broadcast

Broadcast Socket and broadcast IP address

using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
class MainClass
{
   public static void Main()
   {
      Socket sock = new Socket(AddressFamily.InterNetwork,SocketType.Dgram, ProtocolType.Udp);
      sock.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.Broadcast, 1);
      IPEndPoint iep = new IPEndPoint(IPAddress.Broadcast, 9999);
      string hostname = Dns.GetHostName();
      byte[] data = Encoding.ASCII.GetBytes(hostname);
      while (true)
      {
         sock.SendTo(data, iep);
         Thread.Sleep(60000);
      }
   }
}

Udp: Receive Broadcast

using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
class MainClass
{
   public static void Main()
   {
      Socket sock = new Socket(AddressFamily.InterNetwork,SocketType.Dgram, ProtocolType.Udp);
      IPEndPoint iep = new IPEndPoint(IPAddress.Any, 9050);
      sock.Bind(iep);
      EndPoint ep = (EndPoint)iep;
      Console.WriteLine("Ready to receive...");
      byte[] data = new byte[1024];
      int recv = sock.ReceiveFrom(data, ref ep);
      string stringData = Encoding.ASCII.GetString(data, 0, recv);
      Console.WriteLine("received: {0}  from: {1}",stringData, ep.ToString());
      sock.Close();
   }
}