How to bind a ListView to multiple collections stored in a single ViewModel in WPF?

The ItemsSource of a ListView is the collection whose items will appear in the list. So think for a moment about what you're asking the ListView to do.

That's not really possible. ItemsSource expects to be passed something that, at a minimum, implements IEnumerable. Even if you implemented IEnumerable on your EffectView, you would need to wrap Effect and EffectDescription into a single object to return.

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