Hi David,
Basically when displaying child items you need a collection of objects which to display. In your case you have just a single item.
Anyway if you want to display child items and you use the
BindTo method you should use the same overload as shown here (the example is from MVC TreeView but it is the same):
http://demos.telerik.com/aspnet-mvc/treeview/databindingtomodel
In your case it shoud be something like this:
All the best,
Petur Subev
the Telerik team
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