title: Facebook C# SDK Windows Phone logout
body: <p>I have implemented a method by which a user can get a FB token on a windows phone 8 application. This is implemented via the Facebook C# SDK.</p>
  
  <p>However, it seems that the client's token is cached, since the webbrowser control does not prompt for credentials anymore after the first logon.</p>
  
  <p>Can anyone point out how to implement a logout method?</p>