I am aware that Window has a SizeToContent property that when set to SizeToContent.WidthAndHeight keeps the window as small as it can to fit it’s contents.

What I want to implement is a way to set a window’s minimum size to this size. I investigated the code that uses the SizeToContent property to measure the window: Window.cs#L994 and saw that, to get this size I would need access to PlatformImpl.MaxAutoSizeHint, but that property is internal.

Is there another way to get this value? Or more generally, could I obtain the minimum size a UserControl would need to fit its contents?