SharePoint 2007 does not enable ASP.NET AJAX by default. Although the process to enable ASP.NET AJAX on a SharePoint 2007 web application is rather straightforward, it can be time consuming and error prone due to the amount of web.config entries
Feature Receiver Basics
As you begin developing more and more complex features to be deployed to SharePoint, you will most likely come across the need to perform some additional actions when your feature is installed and activated as well as extra clean-up when