private function SaveNewGroups(array $exGroupIDs, array $selGroupIDs)
    {
        foreach ($selGroupIDs as $selGroupID)
        {
            if (!in_array($selGroupID, $exGroupIDs))
            {
                $mmg = new MemberMembergroup();
                $mmg->SetMember($this->member);
                $mmg->SetMemberGroup(new Membergroup($selGroupID));
                $mmg->Save();
            }
        }
    }