We will implement our page and an interface to support it. Windows App SDK almost forces us to use a better design by removing the DataContext from the Window. The page object is a control and it has the DataContext.
We will still implement an interface like we have a hundred pages though.
We are going to use WinAppSDK XAML to create a simple Vector Graphics application using MVVM (that is Model View ViewModel) design pattern. Let's get to this! We'll implement ICommand, IValueConverter, and of course INotifyPropertyChanged to support MVVM.