Free E-Books
Regular Expression
http://msdn.microsoft.com/en-us/library/az24scfc.aspx
.NET Developer Checklist
http://madskristensen.net/post/The-ASPNET-developer-checklist.aspx
Web Application Projects vs. Web Site Projects
http://msdn.microsoft.com/library/dd547590.aspx
Microsoft Web Technologies and MVC
http://www.codeproject.com/Articles/528117/WebForms-vs-MVC
MVC View Engine: Razor
http://weblogs.asp.net/scottgu/archive/2010/07/02/introducing-razor.aspx
Threading in C#
http://www.albahari.com/threading/
Claims Authentication and Authorization (Dominick Baier presentation)
Getting started with WIF (Windows Identity Foundation)
http://msdn.microsoft.com/en-us/library/hh545426.aspx
ASP.NET Page Lifecycle
http://msdn.microsoft.com/en-us/library/ms178472(v=VS.100).aspx
http://wiki.asp.net/page.aspx/1512/aspnet-page-life-cycle-events/
ASHX Http Handler
http://www.dotnetperls.com/ashx
Various
ASP Sitemap: http://www.codeproject.com/Articles/669717/How-to-correctly-use-sitemap-for-top-left-menus