This weekend I created an ASP.NET Runtime Cheat Sheet to be used as a quick reference for HttpRequest, HttpRuntime and AppDomain/Process/Identity stuff.
It shows several members of those classes, each with its live value from my site, a link to MSDN, and some explanations. I included links to useful tools (like Process Monitor) and good posts (like anything K. Scott Allen writes). The idea is to be brief and have the highest possible information-per-word ratio.
I wrote all of the information retrieval code as a user control, so it is easy to embed into an application for debugging. The code is in AspNetRuntimeDiagnostics.ascx, MIT-licensed as usual. The output should be restricted to trusted users though, since it’s a lot of information to potential attackers.
I hope this is useful to others. There are a couple of bits that could use more description, which I plan to add. The cheat sheet is a live document, your suggestions and corrections are very welcome.