In order for us to be able to use AJAX controls we need to install the AJAX Control Toolkit.

There should be a link to download AJAX Control Toolkit for .Net Framework 3.5.

1. Download this file, extract it anywhere (e.g. program files)
2. go to the extracted directory.
3. go to the <dir>/SampleWebSite/Bin
4. copy everything from that folder into the <dir>/Binaries directory
5. Open up VS2008.
6. In the Toolbox panel, right-click to make a new tool tab. name it something like ajax control toolkit
7. add the controls by browsing to and selecting the <dir>/Binaries/AjaxControlToolkit.dll
8. This should add all the controls to that tab