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Windows® Phone 8 Unleashed by Daniel Vaughan

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Auto-Launching with a File Extension Association

File associations allow your app to automatically launch when the user attempts to open a file of a particular type, or when another app requests the OS to open a file.

A file could come from a variety of sources including the following:

Image An email attachment

Image A link on a website via the phone’s web browser

Image A Near Field Communications (NFC) tag

Another installed app

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