Galin Iliev's blog

Software Architecture & Development

ASP.NET AJAX 1.0 upgrade to VS 2008 Beta 2

Although ASP.NET AJAX is now built-in Visual Studio 2008 and it has full backward compatibility (meaning you don't have to change the code) you will have to take some actions to make your old projects run on Visual Studio 2008 Beta 2

MS WebDev Tools team has a nice post Upgrading ASP.NET AJAX 1.0 Websites and Web Applications to .NET Framework 3.5.