We are using data binding in our application, and are having trouble
finding out how to bind a hierarchy of lists of business objects.

What we have is this hierarchy:

List<Orders>
        |
   (Order)
        |- List<Groups>
                      |
                 (Group)
                      |- List<Members>

We want to create a form where each of these lists is displayed in a
grid, and data is updated depending on what the user selects. The grids
cannot be nested. Can this be done?