using System;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Text;
class MainClass
{
public static void Main()
{
string data;
IPEndPoint ip = new IPEndPoint(IPAddress.Any, 9999);
Socket socket = new Socket(AddressFamily.InterNetwork,SocketType.Stream, ProtocolType.Tcp);
socket.Bind(ip);
socket.Listen(10);
Socket client = socket.Accept();
IPEndPoint newclient = (IPEndPoint)client.RemoteEndPoint;
Console.WriteLine("Connected with {0} at port {1}",newclient.Address, newclient.Port);
}
}