Get Active Directory Users

//GetUsers DirectorySearcher searcher = new DirectorySearcher(de); searcher.Filter = "(objectClass=user)"; searcher.SearchScope = SearchScope.Subtree; SearchResultCollection results = searcher.FindAll(); UserCollection users = new UserCollection(); users.Users = new User[results.Count]; int index = 0; foreach (SearchResult result in results) { DirectoryEntry directoryEntry = result.GetDirectoryEntry(); users.Users[index] = new User(); users.Users[index].Email = (directoryEntry.Properties["Mail"].Count >= 1) ? directoryEntry.Properties["Mail"][0].ToString() : ""; string DomainName = [...]