// (c) 2006 Richard Grimes
// www.grimes.demon.co.uk

using System;
using System.Threading;
using System.Security.Principal;

class App
{
   static void Main()
   {
      WindowsIdentity identity = WindowsIdentity.GetCurrent();
      Console.WriteLine("{0} is in: ", identity.Name);
      foreach (SecurityIdentifier sid in identity.Groups)
      {
         NTAccount account = (NTAccount)sid.Translate(typeof(NTAccount));
         Console.WriteLine(account);
      }
   }
}