In Windows Phone 8 App, how can I realize the command "I give you some content if you put a like on my Facebook page"?

Question

I'm developing a Windows Phone App for 8/8.1. I would like to give to user free content if he puts a "Like" onto the Facebook page of my application.

How can I achieve this effect? I can I be sure that the "Like" is put to the page?

Answer 1

You can't do that. Facebook does not allow it. You can't even see who likes your page if he's not a friend of yours.

This, though, is something most users don't know. Adding a webview redirecting them to the page will work most of the time, since the majority of them will like the page anyway.