If you’re having problems creating WPF or WPF browser applications with Visual C# Express and Visual Basic Express, you may be running into an issue that we know about (http://blogs.msdn.com/johnmont/archive/2007/04/19/visual-studio-express-quot-orcas-quot-available.aspx). We expect to have a patch for this issue, specific to creating WPF or WPF browser application from VC# Express or VB Express, available shortly. If you’re having other issues, please do visit  http://forums.microsoft.com/MSDN/ShowForum.aspx?ForumID=169&SiteID=1.