You say you have objects of different types. However RadTreeListView is build in such manner the items in different levels of hierarchy share the same columns. This means even different types, to be displayed in RadTreeListView , the must have matching properties.
If this matches your scenario, we can think of some workaround.
To be able to further help you , I will need some details on your business objects. Can you please give me the implementation of both the root level and the child level objects. In case there is a way to display them in RadTreeListView I will give you a sample project with the implementation in return.
the Telerik team
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