title: How would you handle facebook session expiration?
body: <p>I am a ASP.NET developer using Facebook Developer Toolkit to develop a facebook flash application with flash developer.<br>
  When the user plays the game for a certain period of time, there are chances that the facebook session expires and I can't call any Facebook API for processing as a result. </p>
  
  <p>What should I do for this problem?</p>