C# adresse publique

<?php
echo $_SERVER['REMOTE_ADDR'];
?>

    class Program
    {
        static void Main(string[] args)
        {
            Uri url = new Uri("http://demango.ovh.org/adresseip.php");

            WebClient client = new WebClient();
            string ipAdress = client.DownloadString(url);

            Console.WriteLine("Votre adresse IP : " + ipAdress);
            Console.ReadKey();
        }
    }

using System;
using System.Net;

namespace MyIPAdress
{
    class Program
    {
        static void Main(string[] args)
        {
            String strHostName = "";
            if (args.Length == 0)
            {
                // Getting Ip address of local machine...
                // First get the host name of local machine.
                strHostName = Dns.GetHostName();
                Console.WriteLine("Local Machine's Host Name: " + strHostName);
            }
            else
            {
                strHostName = args[0];
            }

            // Then using host name, get the IP address list..
            IPHostEntry ipEntry = Dns.GetHostEntry(strHostName);
            IPAddress[] addr = ipEntry.AddressList;

            for (int i = 0; i < addr.Length; i++)
            {
                Console.WriteLine("IP Address {0}: {1} ", i, addr[i].ToString());
            }
            Console.ReadKey();
        }
    }
}