Convert Asp.net to Asp.net Ajax enabled website in Asp.net 2.0

How can I convert the asp.net website to Ajax enabled website in asp.net 2.0

This quation was very difficult for me change the simple website to Ajax enable website. Simply if we want to make ajax enabled website then select the Ajaxenabledwebsite from the Dashboard when click on file new and website. but if I din't this then I faced problem to convert this asp.net website to Ajax enabled website. its very simple

step1: add the ajaxcontrolltoolkit.dll in your application bin folder by add refrence.

step2: add the some line of code in web.config inside the
<httphandlers><br /> <remove verb="*" path="*.asmx"><br /> <add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"><br /> <add verb="*" path="*_AppService.axd" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"><br /> <add verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" validate="false"><br /> </httphandlers><br />