This is the main page of the application that is launched after the app is initialized. It’s the default one included in a project, but you can add as many pages as you want in your project. Every page has the same structure: it’s composed of a file with the extension .xaml, which defines the user interface, and a file with extension .cs, which is the code behind that defines the logic for interacting with the user interface. Every page inherits from a class called PhoneApplicationPage that offers built-in support for properties and events that are connected to the page life cycle, such as navigation events, orientation, system tray management, and more.
