Ellipse with explicit SolidColorBrush
<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"> <Ellipse Name="myEllipse" Height="100"> <Ellipse.Fill> <SolidColorBrush x:Name="myBrush" Color="Red" /> </Ellipse.Fill> </Ellipse> </Page>