Read original post at Windows Phone 7 Developer Guide
When you create a new “Windows Phone Application” project in Visual Studio, you get a complete app that you can instantly compile into a .xap file and deploy to the emulator or a physical phone. The app doesn’t actually do anything other than display some text on the screen, but it sets up a lot of infrastructure that would be difficult and tedious to
create from scratch. Before creating the Tally app, let’s understand the main pieces of any new “Windows Phone Application” project:
- The application manifest
- Images
- XAML code: MainPage.xaml and App.xaml
- C# code: MainPage.xaml.cs, App.xaml.cs, and AssemblyInfo.cs