title: Issue with Facebook c# toolkit and authentication
body: <p>I've used the excellent Facebook c# SDK <a href="http://facebooksdk.codeplex.com/" rel="nofollow">http://facebooksdk.codeplex.com/</a> to integrate a website with facebook to get profile info etc but now I need to actually create a canvas app in an iframe. I'm just starting simply with the MVC sample app in the toolkit and have set the app id, key, secret, canvasPageUrl but when I go to the profile link (and the authentication stuff kicks in) facebook gives me a polite but confising error. </p>
  
  <p><em>To fix this error, please set your Connect URL in the application settings editor. Once it has been set, users will be redirected to that URL instead of this page after logging in.</em></p>
  
  <p>The thing is, this is using OAuth, not connect, and the connect URL doesn't even exist as a parameter in the application settings. I've dug around, found one php example with this problem but didn't seem appropriate as it was using a completely different auth method. Any ideas facebook pros? </p>
  
  <p>David</p>