IP address from host name

using System;//  j ava2  s  .c om
using System.Net;

class MainClass
{
    public static void Main()
    {
        IPHostEntry ihe = Dns.GetHostByName(Dns.GetHostName());
      IPAddress myself = ihe.AddressList[0];

        Console.WriteLine(myself);
    }
}

using System;/*  java 2  s. c  o  m*/
using System.Net;

class MainClass
{
   public static void Main(string[] argv)
   {
      IPAddress test = IPAddress.Parse("64.200.123.1");

      IPHostEntry iphe = Dns.GetHostByAddress(test);

      Console.WriteLine("Information for {0}", test.ToString());

      Console.WriteLine("Host name: {0}", iphe.HostName);
   }
}