Why visual studio 2005 doesn’t support importing class diagrams into vsio ?

Well… guys… I think you have used class diagrams in Visual Studio 2005. That’s cool right. Not like crappy interface we have seen in vsio it has very nice interface.
But some times we want to have our class diagrams in visio ‘cos Visual Studio does not supporting diagrams other than class diagrams. So if you are designing your application you may have to have couple of other type of diagrams too right. Domain, Use case, Robustness etc etc…

Problem is we can’t export our class diagrams into visio in VS 2005 but to an image only. I wonder any plug-in is available for importing VS class diagrams into visio. Any idea….?