Enumeration netInterfaces=NetworkInterface.getNetworkInterfaces();
while(netInterfaces.hasMoreElements()){
NetworkInterface ni=(NetworkInterface)netInterfaces.nextElement();
System.out.println(ni.getName());
ip=(InetAddress) ni.getInetAddresses().nextElement();
if( !ip.isSiteLocalAddress() && !ip.isLoopbackAddress() && ip.getHostAddress().indexOf(":")==-1){
System.out.println("Interface "+ni.getName()+" seems to be InternetInterface. I'll take it...");
break;
}else{
ip=null;

namespace NKUtilities
{
using System;
using System.Net;

public class DNSUtility
{
public static int Main (string [] args)
{

String strHostName = new String ("");
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.GetHostByName (strHostName);
IPAddress [] addr = ipEntry.AddressList;

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