This is part of a series on New WPF Features
In previous releases, WPF open\Save dilogs had the XP style even on Vista. Some workarounds were to use the Vista bridge library or use the winforms dialogs. For this release we fixed this issue. You now get the OS style dialogs :) ... Usage wise its the same, you get the updated behavior for free ... The pic below shows the difference.
How about a folder browser dialog?
What about message box dialogs? MessageBox.Show("Yuck") still uses un-themed controls.
WinForms has had support for controls for over half a decade, so WPF is certainly put to shame here.