Multi-targeting your Windows Phone Application to Run on 7.0 and 7.5 (Mango)

Introduction

With the general availability of Windows Phone "Mango", Windows Phone consumers around the world might have one of two Windows Phone OS on their phones - the original Windows Phone 7.0 or the recently announced Windows Phone 7.1 (code-named "Mango").

Smart developers would like to make sure that their Windows Phone application can target the older version of Windows Phone (7.0) even though they may be using the latest version of Windows Phone development tools (7.1)

Why Multi-targeting

Developers usually release fixes for their applications. However each update of their application is tied to the target version of the Windows Phone operating system. Say, you have a YouTube application created for the original WP 7.0 OS. Say, a new version of this application is available, which fixes a lot of bugs that existed in the original application. If this updated application is targeted for Windows Phone 7.1, then users that still have WP 7.0 will not see this update. Hence, developers will need to release two versions of the application - one targeted for WP 7.0 and another targeted for WP 7.1 "Mango".

How to Specify Multi-targeting in Your Visual Studio Project

Fortunately for Windows Phone developers, the SDK tools for Windows Phone 7.1 bring multi-targeting support to Visual Studio.

Whenever a developer creates a Windows Phone application/library using Windows Phone "Mango" SDK tools, they have an option to choose the Windows Phone version they want to target.

For example, let us create a Windows Phone application using WP 7.1 SDK tools.

Create a Windows Phone application using WP 7.1 SDK tools
Figure 1: Create a Windows Phone application using WP 7.1 SDK tools

When we click OK, Visual Studio prompts us to choose the Windows Phone OS version we want to target.

Target Windows Phone OS Version
Figure 2: Target Windows Phone OS Version

If we choose 7.0 as the target version, and you open up the WMAppManifest.xml file, you will notice the following line.

<Deployment xmlns="http://schemas.microsoft.com/windowsphone/2009/deployment" AppPlatformVersion="7.0">

If we choose 7.1 as the target version, the WMAppManifest.xml file will contain the following.

<Deployment xmlns="http://schemas.microsoft.com/windowsphone/2009/deployment" AppPlatformVersion="7.1">

We see that WP 7.0 and WP7.1 applications basically differ in the AppPlatformVersion property in its application manifest file.

Summary

In this article, we learned how to multi-target a Windows Phone application. I hope you have found this information useful. You can check out the different values of AppPlaformVersion property by creating your own projects or downloading the sample project from here.



About the Author

Vipul Vipul Patel

Vipul Patel is a Software Engineer currently working at Microsoft Corporation, working in the Office Communications Group and has worked in the .NET team earlier in the Base Class libraries and the Debugging and Profiling team. He can be reached at vipul_d_patel@hotmail.com

Comments

  • There are no comments yet. Be the first to comment!

Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • The 3rd Platform of computing, based around the four pillars of mobile computing, social media, big data and analytics, and cloud, is redefining what IT infrastructure needs to provide. Endpoint solutions must meet not only traditional data protection requirements, but also a new set of requirements driven by the explosion in mobile computing. This IDC white paper explores the customer challenges associated with safeguarding data residing on various endpoint devices, including laptops, tablets, and …

  • Tintri smart storage addresses the mismatch between storage and the demands of virtualization. Built on the industry's first and leading intelligent application-aware architecture, VMstore and Tintri Global Center have the intelligence to deliver unparalleled performance and efficiency and end-to-end insights into the infrastructure, while allowing for unmatched VM control.

Most Popular Programming Stories

More for Developers

RSS Feeds

Thanks for your registration, follow us on our social networks to keep up-to-date