title: Disabling ASP.NET Session refresh for specific request
body: <p>We have a website that has a 20 minute session timeout and our users want a 10 minute session expiry warning. At the moment we're using a control which kinda does the job but it isn't AJAX aware and so pops up even if the user has been doing stuff.</p>
  
  <p>I have an idea to get around this by just polling the server every 2 minutes to find out how long the user has left on their session. But after research i can not find out if its possible to say "This request shouldn't refresh the timeout", which is crucial as the act of polling would inadvertently refresh the session timeout.</p>
  
  <p>Is this possible, or am I going about it the wrong way?</p>