Read original post by Usman Ur Rehman Ahmed at Microsoft Pakistan Community Blog
This is a beginner level post to get you started with JSON, familiarize you with basic communication with web server and Facebook Graph API. Consider a scenario where you want to grab details of a particular Facebook page or a person’s profile in Windows Phone app. A standard practice is to use Facebook Graph API which is a social graph. To begin with you can grab JSON output of a particular page by calling the Facebook graph API end point,
http://graph.facebook.com/<PageNameHere>
Calling this Url you’ll get a JSON reply that will include the details of the particular page.