Where is the RadialGradientBrush in WinRT XAML?

windows-8, winrt-xaml

Solution

Unfortunately, in this initial version, RadialGrandientBrush is not supported.

Problem

Building XAML WinRT application & noticed the RadialGradientBrush is nowhere to be found? Where is the RadialGradientBrush in WinRT XAML?

Original source