Udp server setup : Socket Udp Server « Network « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. Network
3. Socket Udp Server

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

class MainClass
{
   public static void Main()
   {
      int receivedDataLength;
      byte[] data = new byte[1024];
      IPEndPoint ip = new IPEndPoint(IPAddress.Any, 9999);

      Socket socket = new Socket(AddressFamily.InterNetwork,SocketType.Dgram, ProtocolType.Udp);

      socket.Bind(ip);

      IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);
      EndPoint tmpRemote = (EndPoint)(sender);

      receivedDataLength = socket.ReceiveFrom(data, ref tmpRemote);

      Console.WriteLine("Message received from {0}:", tmpRemote.ToString());
      Console.WriteLine(Encoding.ASCII.GetString(data, 0, receivedDataLength));

      string welcome = "Welcome";
      data = Encoding.ASCII.GetBytes(welcome);
      socket.SendTo(data, data.Length, SocketFlags.None, tmpRemote);

      for(int i = 0; i < 5; i++)
      {
         data = new byte[1024];
         receivedDataLength = socket.ReceiveFrom(data, ref tmpRemote);
         Console.WriteLine(Encoding.ASCII.GetString(data, 0, receivedDataLength));
      }
      socket.Close();
   }
}