When I start up VS 2008 to work on a WPF / Silverlight App and open a XAML or XML file the XAML / XML editor is no longer working. The designer does not show up and intelli
i had similar problems when i installed VS2008 Professional over an existing VS2008 Express edition. Suddenly my XAML designer stopped working . i got failed loading the XAML dll error. So i just uninstalled all VS Express stuff and then installed VS 2008 SP1 fixed all things.
try link below for VS 2008 SP1.
http://www.microsoft.com/downloads/details.aspx?FamilyId=27673C47-B3B5-4C67-BD99-84E525B5CE61&displaylang=en