What ASP.NET Programmers Should Know About Application Domains
http://www.odetocode.com/articles/305.aspx
Application vs. AppDomain
http://weblogs.asp.net/owscott/archive/2007/09/02/application-vs-appdomain.aspx
What is the diff. b/w Application Domain & Application Pool in .NET?
http://in.answers.yahoo.com/question/index?qid=20071223011529AARcKYI
Thoughts on ApplicationPool recycling and application availability
http://blogs.msdn.com/david.wang/archive/2006/01/26/Thoughts-on-Application-Pool-Recycling-and-Application-Availability.aspx
HOWTO: Basics of II6 troubleshooting
http://blogs.msdn.com/david.wang/archive/2005/12/31/HOWTO_Basics_of_IIS6_Troubleshooting.aspx
Troubleshooting process
http://weblogs.asp.net/steveschofield/archive/2006/07/08/Troubleshooting-process.aspx#comments
Rico Mariani’s Performance Tidbits – When to call GC.Collect()
http://blogs.msdn.com/ricom/archive/2004/11/29/271829.aspx