Some good articles -ASP.net

State Management another good article
http://www.codeproject.com/KB/books/ASPNET20.aspx

ASP.NET Page Life Cycle Overview
http://msdn.microsoft.com/en-us/library/ms178472.aspx?wa=wsignin1.0

Dynamic Events on an ASP.NET Page
http://www.dotnetjunkies.ddj.com/Tutorial/D481E737-BA40-472E-BEBD-E193FC68F8F2.dcik

ASP.NET Ajax Under-the-hood Secrets

http://www.codeproject.com/KB/ajax/aspnetajaxtips.aspx