Udp server setup : Socket Udp Server : Network C# Examples

    
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();
      }
}