C#

<br />
using System.Net;<br />
<br />
// ...<br />
<br />
IPHostEntry hostEntry = Dns.GetHostByName(Dns.GetHostName());<br />
IPAddress[] addresses = hostEntry.AddressList;<br />
for(int x = 0; x < addresses.Length; x++) {<br />
   Console.WriteLine(addresses[x]);<br />
}<br />

using System;
using System.Net;
using System.Net.Sockets;

public class IPAddresses
{
  static void Main(string[] args)
  {
    string name = Environment.MachineName;
    if (args.Length > 0)
      name = args[0];

    IPHostEntry host = Dns.GetHostByName(name);
    foreach (IPAddress address in host.AddressList)
    {
      Console.WriteLine("{0,15}: {1}", address.AddressFamily, address);
      if (address.AddressFamily == AddressFamily.InterNetworkV6)
        Console.WriteLine("                 ScopeID: {0}", address.ScopeId);
    }
  }
}