Popup.CreateRootPopup Method (Popup, UIElement)
Attaches a child element to a Popup control.
Assembly: PresentationFramework (in PresentationFramework.dll)
You might want to create a custom control that has the same functionality as an existing control and also exhibits the behavior of a Popup. You can make your control behave like a Popup by adding a Popup to your control and calling the method.
This method assigns child to the child property and binds the following properties to child.
When you call UIElement. Also, PlacementTarget should be set on your control before you call this method., child cannot be a child of a
Available since 3.0