ASP.Net - Performing Asynchronous Work, or Tasks

An indepth post on performing Performing Asynchronous Work, or Tasks, in ASP.NET Applications by. Thomas Marquardt

Also see:

PageAsyncTask: http://msdn.microsoft.com/en-us/library/system.web.ui.pageasynctask.aspx

IHttpAsyncHandler: http://msdn.microsoft.com/en-us/library/system.web.ihttpasynchandler.aspx

Async Pages: http://msdn.microsoft.com/en-us/library/ydy4x04a.aspx

Scalable Apps with Asynchronous Programming in ASP.NET: http://msdn.microsoft.com/en-us/magazine/cc163463.aspx with information on Asynchronous Pages, Asynchronous HTTP Handlers
and Asynchronous HTTP Modules.