using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
class MainClass
{
public static void Main()
{
byte[] data = new byte[1024];
IPEndPoint ip = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 9999);
Socket server = new Socket(AddressFamily.InterNetwork,SocketType.Dgram, ProtocolType.Udp);
string welcome = "Hello";
data = Encoding.ASCII.GetBytes(welcome);
server.SendTo(data, data.Length, SocketFlags.None, ip);
IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);
EndPoint tmpRemote = (EndPoint)sender;
data = new byte[1024];
int receivedDataLength = server.ReceiveFrom(data, ref tmpRemote);
Console.WriteLine("Message received from {0}:", tmpRemote.ToString());
Console.WriteLine(Encoding.ASCII.GetString(data, 0, receivedDataLength));
server.SendTo(Encoding.ASCII.GetBytes("message 1"), tmpRemote);
server.SendTo(Encoding.ASCII.GetBytes("message 2"), tmpRemote);
server.SendTo(Encoding.ASCII.GetBytes("message 3"), tmpRemote);
server.SendTo(Encoding.ASCII.GetBytes("message 4"), tmpRemote);
server.SendTo(Encoding.ASCII.GetBytes("message 5"), tmpRemote);
server.Close();
}
}