windows phone 7 + how to programmatically launch an app from another app [duplicate]

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Possible Duplicate:

How can I launch a Windows Phone 7 app programmatically?

How can I programmatically launch an app from another app either in Windows Phone 7 or 7.1

Please help.

Regards.

EDIT 1 : Can I use Launchers and Choosers for launching apps. If yes how this can be done.

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I'm afraid that you can't do that.

What you can do is access launchers and choosers that the OS provide but you can't access anything of a third party

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Windows Mobile 7 does not have Intents like android, no apps can register mime types for their use as of now.