New Post: Change PropertyGrid Theme

Application loads different theme depending on operation system. Application loads Generic theme on windows 7, but loads aero2 on windows 8.

I want a single theme independent of operating system. I have used AvalonDock and in that I was able to choose a single theme using this

<avalonDock:DockingManager.Theme>
        <darkMetro:MetroTheme/>
    </avalonDock:DockingManager.Theme>
    <avalonDock:LayoutRoot>

Is it possible for PropertyGrid as well? If yes then please show me the code.