title: Pay Pal IPN delay - is sleeping site solution
body: <p>I use pay pal subscriptions on site.<br/>
  When user pay on pay pal I wait IPN message to save it in database.<br/>
  Also, after payment user is redirected from pay pal to my site where I must check if IPN message is stored in database, and based on that I do some other stuff ind atabase.<br/>
  The problem is when user is redirected to site sometimes it happens that IPN message is not there yet so I can't do what I want.<br/>
  So I was thinking to somehow stop application for three seconds but I never did something like this and I don't know is it good to do.<br/><br/>
  Is it normal that IPN messages delay a few seconds?<br/><br/>
  If I say <code>Thread.Sleep(3000)</code> is it possible to display animated loader in web application in this way?<br/></p>