Unity & WPF - injecting a DataContext via property injection to a child control?

The answer depends on whether the main windows 'owns' the child windows as a Composite View, or it creates new Views on the fly (for modal or non-modal child windows).

I have also struggled with the concept on injecting DataContext into my views (UserControls). The idea of exposing child viewmodels via the main window viewmodel has a limited amount of appeal?

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