Specifies whether the View for which a View Controller is intended must be root, nested or any.
View Controllers are activated for both Windows and Frames. However, you can specify the View kind to provide a View Controller activation within the Window or Frame via the TargetViewNesting property.
The TargetViewNesting property affects only ViewController's activation. Controller.FrameAssigned and other events that are irrelevant to the view nesting always fire.