WPF copy blend Regular Polygon into application

Question

I have created a ellipse with a triangle in Blend 2012. I went to copy the xaml into my WPF application. However I get the error message "The name RegularPolygon does not exist in the namespace http://schemas.microsoft.com/expression/2010/drawing . What is missing?

   <Application x:Class="WpfSimulator.App"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:ed="http://schemas.microsoft.com/expression/2010/drawing" 
         StartupUri="MainWindow.xaml">
<Application.Resources>

 <ed:RegularPolygon HorizontalAlignment="Left" Height="32" InnerRadius="1" Margin="29,14,0,0" PointCount="3" Stretch="Fill" Stroke="Black" StrokeThickness="0" VerticalAlignment="Top" Width="37" RenderTransformOrigin="0.5,0.5">
        <ed:RegularPolygon.RenderTransform>
            <TransformGroup>
                <ScaleTransform/>
                <SkewTransform/>
                <RotateTransform Angle="90.492"/>
                <TranslateTransform/>
            </TransformGroup>
        </ed:RegularPolygon.RenderTransform>
        <ed:RegularPolygon.Fill>
            <RadialGradientBrush RadiusY="1.241" RadiusX="0.611">
                <GradientStop Color="#FF1F1FD8"/>
                <GradientStop Color="White" Offset="1"/>
            </RadialGradientBrush>
        </ed:RegularPolygon.Fill>
    </ed:RegularPolygon>

Answer 1

You should add reference to the assembly Microsoft.Expression.Drawing . Like this: