This is an article in the Developer Tips series, which offers concise hints to enhance productivity. You can access all the articles in this series here.
Border:
From .NET MAUI 9 onwards, the Frame control has been marked as obsolete, paving the way for more robust Border control.
An article has already been published detailing the comprehensive features of .NET MAUI 9.
The Border serves as a container control, akin to the Frame; however, it exhibits significantly greater flexibility, enabling the user to delineate any enclosed geometric shape.