I have a RadGrid being populated by an IEnumerable list of custom business objects (Orders). I am trying to compile a list of line items to add to the new order prior to saving (creating & inserting order in database) I am using a PopUp edit form for the RadGrid that has a RadListView on it. What is the best way to populate a list of items in memory that can be used both to databind to the RadList and create line items when the user chooses to "save" the Order? I can't save the list to the database, because an Order must exist first to reference to.