https://learn.microsoft.com/en-us/uwp/api/windows.ui.xaml.media.rectanglegeometry?view=winrt-28000
RectangleGeometry Class (Windows.UI.Xaml.Media) - Windows apps | Microsoft Learn
Describes a two-dimensional rectangular geometry.
media appsclasswindowsuixaml
https://learn.microsoft.com/en-us/windows/windows-app-sdk/api/winrt/microsoft.ui.xaml.media.rectanglegeometry.rect?view=windows-app-sdk-2.0
RectangleGeometry.Rect Property (Microsoft.UI.Xaml.Media) - Windows App SDK | Microsoft Learn
Gets or sets the dimensions of the rectangle.
windows apprectpropertymicrosoftui