5 easy steps for a Windows Phone 7.1(Mango) to 7.0 application downgrade

 

I like to play a lot with latest beta version of Windows Phone named Mango.
I like mostly the new Windows Phone Performance Analysis tool available in Debug menu.

But after I tested my app, when in comes to come back to current version in market (7.0) the application platform cannot be changed back.

Let’s do some tricks to get it back in just five easy steps.

1. Unload the wp7 application

2. Edit the project (.csproject) files

change the line

    ...
    <TargetFrameworkProfile>WindowsPhone71</TargetFrameworkProfile>
    ...

into

    ...
    <TargetFrameworkProfile>WindowsPhone</TargetFrameworkProfile>
    ...

3. Reload the project

4. Edit Properties\WMAppManifest.xml file

5. Change AppPlatformVersion of Deployment node

from 7.1 to 7.0

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

to

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

That’s all folks!