Authentic Windows 7 Theme in Windows 10?

The WPF Theme for Aero is located in the PresentationFramework.Aero library, so add that as a reference. Then, in your App.xaml add the following merged dictionary to override the default theme.

<ResourceDictionary.MergedDictionaries>
        <ResourceDictionary Source="/PresentationFramework.Aero;component/themes/Aero.NormalColor.xaml" />
</ResourceDictionary.MergedDictionaries>

I'm pleasantly surprised that they've finally updated WPF in .NET 4.5 to support Windows 8/10 themeing (they didn't at the start of Windows 8) with the following:

• PresentationFramework.Aero2
• PresentationFramework.AeroLite

Haven't seen it before today, need to work with .NET 4.5 more often ;)