I am interested in the hierchical datagrid for drilldown. However, because of the generic nature of my application, I cannot have a set relationship between tables. So I have to set the relationship at runtime. So there is no Child Collection in the Parent Grid I can point to. Is there anyway to make the hierchical grid relationships at runtime manually? My relationship on all tables is ParentID of one table is related to ID of another table. But any table can relate to any other table.