private void AddAttributeGroups()
 {
     AttributeGroupCollection groups = new AttributeGroupCollection(CurrentOrganization.OrganizationID);
     foreach (AttributeGroup group in groups)
     {
         ListItem item = new ListItem(group.GroupName);
         item.Attributes["optgroup"] = "1";
         drpAttribute.Items.Add(item);
         AddAttributes(group);
     }
 }
        private void AddAttributeGroups()
        {
            AttributeGroupCollection groups = new AttributeGroupCollection(CurrentOrganization.OrganizationID);

            foreach (AttributeGroup group in groups)
            {
                ListItem item = new ListItem(group.GroupName);
                item.Attributes["optgroup"] = "1";
                drpAttribute.Items.Add(item);
                AddAttributes(group);
            }
        }