Scott Guthrie again shows one of the new feature of the new Visual Studio 2008 which is the improved designer support for ASP.NET AJAX Control Extenders.
What are ASP.NET Control Extenders?
The ASP.NET AJAX Control Toolkit is a great example of a project that takes advantage of this control extender functionality. It includes more than 40+ free control extenders that you can easily download and use to add AJAX functionality to your applications.
For example, let’s assume we wanted to have a textbox on a page where a user could enter a date:
Enabling this is trivial using the ASP.NET AJAX Control Toolkit. Just add the “CalendarExtender” control that ships with it to the page and point its “TargetControlID” property at the :
Using ASP.NET AJAX Control Extenders in VS 2008
With VS 2005 you had to manually wire-up control extenders yourself (either via source-view or via the property grid).
VS 2008 makes it even easier to discover and attach control extenders to your controls.