What Conditions Cause a Web Application to Be Just In Time Compiled?

Question

I'm curious as to the exact conditions that cause an application to be Just In-Time Compiled?

I think we all know the first visit to a non pre-compiled site will cause a JIT. What about throwing new code into the App_Code directory?

I'm pretty sure some actions like saving the web.config simply cause the cause the Application Pool to unload and so far I'm a little confused as to which action has which result.

I'd love to get a link to some good MS documentation or failing that the thoughts of an ASP.NET all star.

Thanks in advance!

Answer 1

Understanding ASP.NET Dynamic Compilation

ASP.NET Application Life Cycle Overview for IIS 5.0 and 6.0, section "Compilation Life Cycle"