void Member_AfterSave(umbraco.cms.businesslogic.member.Member sender, umbraco.cms.businesslogic.SaveEventArgs e)
        {
            string groups = "";
            foreach (MemberGroup mg in sender.Groups.Values) {
                groups += mg.Text + ",";
            }

            sender.getProperty("groups").Value = groups.Trim().Trim(','); ;
            sender.XmlGenerate(new System.Xml.XmlDocument());
        }