How to: A ListBox from two sources?

I am usin开发者_运维百科g EF with WPF.

How should I create a ListBox that shows both Contacts and Persons?

My question is rather how to retrieve it and create the CollcetionViewSource(s).

I know I will have to use ItemTemplateSelector, that's less what I care, what I really care is the retrieval, but any tips on the representation will be welcommed as well.

Thanks

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See the CompositeCollection class.