问题 The following method I created seem does not work. An error always happens on foreach loop. NotSupportedException was unhandled...The provider does not support searching and cannot search WinNT://WIN7,computer. I'm querying the local machine private static void listUser(string computer) { using (DirectoryEntry d= new DirectoryEntry("WinNT://" + Environment.MachineName + ",computer")) { DirectorySearcher ds = new DirectorySearcher(d); ds.Filter = ("objectClass=user"); foreach (SearchResult s