DirectoryEntry computers = new DirectoryEntry("WinNT://JBVAS");//The domain
        IEnumerator enumerator = computers.Children.GetEnumerator();
        while(enumerator.MoveNext())
        {
            DirectoryEntry entry = enumerator.Current as DirectoryEntry;
            Console.WriteLine("Username: {0}{1}Password: {2}",
                entry.Username, Environment.NewLine, entry.Password);
        }

using ( new Impersonator( "myUsername", "myDomainname", "myPassword" ) )
{
   // code that executes under the new context
}