If you're interested in ASP.NET, IIS, and Visual Web Developer and you're not subscribed to Scott Guthrie's blog, you have a problem. :)  He's the Group Product Manager for the Web Platforms and Tools teams (I hope I got the title right) and all around nice guy.  His posts are always very insightful into either something about Microsoft's Web dev technology or their development processes.  Good stuff.

Anyways, today he posted a very handy code snippet that shows how to track shutdown events in ASP.NET.  I hear he got it from Thomas Lewis, famed ASP.NET evangelist (can't remember his exact title off hand), but wherever it came from, it's useful to help diagnose shutdown issues and see one example of just how well they've instrumented their products.