title: How to get a list of active sessions in a web application?
body: <p>I am trying to get a list of active session id's in my web application.</p>
  
  <p>I tried to manage a list in Global.asax.
  I add session id when Session_Start is fired, and remove session id when Session_End is fired.</p>
  
  <p>The problem is in cases when the user closes the browser or shut down the computer.
  The Session_End is not fired, and the seesion still exists in the list.</p>
  
  <p>Somebody has an idea how can I get the list?</p>
  
  <p>Thanks!</p>