using System;
using System.Security.Principal;
class Program{
   static void Main(){   
      System.AppDomain.CurrentDomain.SetPrincipalPolicy(
                   PrincipalPolicy.WindowsPrincipal);
      IPrincipal pr = System.Threading.Thread.CurrentPrincipal;
      IIdentity  id = pr.Identity;
      Console.WriteLine( "Name : " + id.Name );
      Console.WriteLine( "Athenticated? : " + id.IsAuthenticated );
      Console.WriteLine( "Authentification type : "+id.AuthenticationType);
   }
}