title: ASP.NET MVC 3 - How to handle errors in Global.asax?
body: <p>What is best practice for handling errors that occur in Global.asax (for example in SessionStart)? </p>
  
  <p>In my case I need to handle exceptions that are thrown from a helper class that handles queries against Active Directory.</p>
  
  <p>How do I proceed when I catch an error to inform the user of, for instance, that the AD server cannot be reached?  </p>