Supporting navigation

When you start to build a real application, navigation is one of the first key topics you must address. Other than a very few specific scenarios, in most cases, the application you're going to build will have multiple screens. In WinUI, there are different containers for your layouts:

• Window: This is the main host of your application. Theoretically, a Window control can directly contain content, but it has a few limitations. It doesn't expose a DataContext, it doesn't expose life cycle events (such as Loaded), and it doesn't support navigation. As such, in real-world applications, the Window object acts just as the main container of your application.
• Page: The Page object is the most used container for the content of your application, since it supports features such as DataContext and life cycle events. A real-world application typically has multiple pages, and the user can navigate from one to another by using the navigation menu...