I recently started working on a WPF project in Visual Studio 2008, but didn't get the design mode for the Xaml files to work properly. Trying to turn on the design mode I was faced with the following message:
There is no editor available for ".xaml". Make sure the application for file type(.xaml) is installed.
Tried reinstalling service packs and all, but no luch. Until I ran into this thread. The answer given there worked for me too. And it's to close down Visual Studio and then run the following command:
devenv /resetskippkgs
Voilá, there was the designer in working order! :)