AD Roles

DirectoryEntry de = new DirectoryEntry(String.Empty, Username, Password); if (!String.IsNullOrEmpty(de.Name)) { using (PrincipalContext domain = new PrincipalContext(ContextType.Domain)) using (UserPrincipal user = UserPrincipal.FindByIdentity(domain, Username)) { var groups = user.GetGroups(); foreach (Principal p in groups) { if ( // If there are no search filters, lets return all (SearchCriteria.Count == 0) || //Check if the group matches(partially and case insensitively to the Search Criteria list) SearchCriteria.Where(s => !String.IsNullOrEmpty(s) && p.Name.ToLower().Contains(s.ToLower())).Count() > 0 ) { MatchedGroupsList.Add(p.Name); } } // ForEach } // Using } //de.Name validation