title: Fans-only content in facebook with asp.net C# sdk
body: <p>Hi i'm developing an application in facebook with c# sdk and i want that the user whom liked my page can only use my application. (Like <a href="http://woobox.com/" rel="noreferrer">woobox</a>) </p>
  
  <p>I found some solutions in php in <a href="https://developers.facebook.com/docs/authentication/signed_request/" rel="noreferrer">this link</a> but there isn't any source about .net how can i get the liked info in ASP.NET </p>
  
  <p>I find another examples in php in <a href="http://thinkdiff.net/facebook/how-to-detect-fan-of-a-facebook-page/" rel="noreferrer">this</a> link again but i can't find c# answer :\</p>
  
  <p>Thanks</p>