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Home/ Questions/Q 6655549
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Editorial Team
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Editorial Team
Asked: May 26, 20262026-05-26T01:32:01+00:00 2026-05-26T01:32:01+00:00

I have built my app for WP7.0 – will it still work on WP7.1?

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I have built my app for WP7.0 – will it still work on WP7.1?

Do I need to rebuild it using WP7.1 sdk? If yes, how can i rebuild my current app to 7.1 mango?

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  1. Editorial Team
    Editorial Team
    2026-05-26T01:32:01+00:00Added an answer on May 26, 2026 at 1:32 am

    Your 7.0-built application will work as expected in 7.1, but the fast application switching (multitasking) experience may not be optimal.

    To rebuild/optimise your application for Mango:

    1. Install the updated tools (currently RC)
    2. In the Properties pane of the application, change “Target Windows Phone OS Version” to “Windows Phone OS 7.1”
    3. Update your code in App_Activated to only process the state if ActivatedEventArgs.IsApplicationInstancePreserved is false

    Keep in mind that, for the next few weeks, you cannot release a bug fix for users with 7.0 once you release a 7.1 build.

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