Assuming you are using Visual Studio 2008 and ASP.NET 3.5

1. Download  from  Codeplex.

2.  Extract the zip file to a convenient location  say  C:\AjaxControlToolkit

3.  Open up Visual Studio 2008 and Create a new ASP.NET Website.  Name the site as myAjaxSite

4.  Once website created, Right-click anywhere on Toolbox and choose “Add Tab”.  Name the tab as AjaxControlToolkit.

5. Now right-click anywhere on AjaxControlToolkit region and select “Choose Items”. That will bringup ‘Choose Toolbox Items’ window.

Select  ‘Browse’ and select “C:\AjaxControlToolkit\SampleWebSite\Bin\AjaxControlToolkit.dll”.  Then Click “OK”. It will add all AjaxControlToolkit controls/Extenders to Toolbox.

6. Now you are ready to start using AjaxControlToolkit.

In Part -2, we will start building Ajax site….