Opening an ASP.NET AJAX Project in Visual Studio 2008 Beta 2

Be careful when you open an ASP.NET AJAX Project in Visual Studio 2008 Beta 2! VS2008 thinks it’s a .NET Framework 3.5 Project at first and you will run into problems when you try to use the new controls as the web.config settings are still pointed to the 2.0 Settings. I tried to modify the System.Web.Extensions entries in the web.config manually but forunately there’s a much easier way:

How to fix this: Go to the project properties and convert it back to a .NET 2.0 project. Hit OK and go to the project properties once again. Now choose .NET 3.5 project and it will correctly modify the web.config so you will be able to use the 3.5 tools.

This is a little bug in Visual Studio 2008 Beta 2 which will probably be fixed in the next release.