Fast way to get a list of group members in Active Directory with C#

Question

In a web app, we\'re looking to display a list of sam accounts for users that are a member of a certain group. Groups could have 500 or more members in many cases and we need t

Answer 1

Try this not sure if it would be any faster but....

        PrincipalContext pcRoot = new PrincipalContext(ContextType.Domain)

        GroupPrincipal mygroup = new GroupPrincipal(pcRoot);

        // define the principal searcher, based on that example principal

        PrincipalSearcher ps = new PrincipalSearcher(mygroup);

        ps.QueryFilter = new GroupPrincipal(pcRoot) { SamAccountName = "Name of your group Case Sensitive" };

        List users = new List();
        // loop over all principals found by the searcher

        GroupPrincipal foundGroup = (GroupPrincipal)ps.FindOne();

foreach (UserPrincipal u in foundGroup.Members) 
                    {
                        users.Add(u);

                    }
//OR
List lst = foundGroup.Members.Select(g => g.SamAccountName).ToList();//this will only get the usernames not the user object or UserPrincipal