Typically, you develop an application for Windows Phone 7 by using Microsoft Silverlight and one of the managed programming languages—usually C# or XNA.
A Windows Store app using C++, C#, or Visual Basic, using XAML, is the preferred model for ports from Windows Phone 7. If you are familiar with Silverlight, you can port to a Windows Store app using XAML by using familiar languages like C# or Visual Basic, and a similar set of UI elements and APIs.
For more detail about porting a Windows Phone 7 application to XAML, read Migrating a Windows Phone 7 app to XAML.
However if your a game developer then you can move your existing Windows Phone XNA using Monogame.
Porting to Windows Store app using MonoGame
For some background you can read these posts:
- Windows 8, XNA and MonoGame – Part 1, Overview
- Windows 8, XNA and MonoGame - Part 2, Getting Started
- Windows 8, XNA and MonoGame - Part 3, Getting Windows 8 Store Ready
During the ThreeThing Game event, Dean Ellis @InfSpaceStudios talked through the porting of a one of the teams Windows Phone game, Shear Carnage to Windows 8, the initial port took 7mins 47seconds, which is pretty impressive stuff!
Some of the key features, the team now need to work on now to get the app store ready is..
- In app advertisement
- Windows 8 Store app contracts and charms settings to allow the tweeting and sharing of results
- Development of a online leader board
- A ensuring the app functions is both landscape and portrait modes.