Question

I have the code:

 public bool RemoveUserFromAdministratorsGroup(UserPrincipal oUserPrincipal, string computer)
 {
        try
        {
            PrincipalContext oPrincipalContext = new PrincipalContext(ContextType.Machine, computer, null, ContextOptions.Negotiate, _sServiceUser, _sServicePassword);
            GroupPrincipal oGroupPrincipal = GroupPrincipal.FindByIdentity(oPrincipalContext, "Administrators");

            oGroupPrincipal.Members.Remove(oUserPrincipal);
            oGroupPrincipal.Save();

            return true;
        }
        catch
        {
            return false;
        }

 }

It is worked without any excaption. But when i run my app again i see this user in my listview. So, the user wasn’t removed.

Answer 1

I have solved the issue without AccountManagment namespace.

 public bool RemoveUserFromAdminGroup(string computerName, string user)
 {
        try
        {
            var de = new DirectoryEntry("WinNT://" + computerName);
            var objGroup = de.Children.Find(Settings.AdministratorsGroup, "group");

            foreach (object member in (IEnumerable)objGroup.Invoke("Members"))
            {
                using (var memberEntry = new DirectoryEntry(member))
                    if (memberEntry.Name == user)
                        objGroup.Invoke("Remove", new[] {memberEntry.Path});
            }

            objGroup.CommitChanges();
            objGroup.Dispose();

            return true;
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.ToString());
            return false;
        }
 }