UWP - Add border to an Ellipse

MainPage.xaml

<Page
    x:Class="UniversalAppTutorials.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:UniversalAppTutorials"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d">
    <StackPanel 
        x:Name="StackPanel1" 
        Margin="50" 
        Orientation="Vertical"
        Background="AliceBlue"
        Padding="50"
        >
        <Ellipse
            Width="200"
            Height="200"
            Fill="Orange"
            Stroke="Black"
            StrokeThickness="10"
            Margin="0,0,0,15"
            />
    </StackPanel>
</Page>
MainPage.xaml.cs

using Windows.UI.Xaml.Controls;
using Windows.UI;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Shapes;


namespace UniversalAppTutorials
{
    public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();

            // Create an ellipse
            CreateEllipse();
        }

        private void CreateEllipse()
        {
            // Initialize a new ellipse instance
            Ellipse ellipse = new Ellipse();

            // Set the ellipse height and width
            ellipse.Height = 250;
            ellipse.Width = 250;

            // Fill the ellipse with a solid color
            ellipse.Fill = new SolidColorBrush(Colors.BlueViolet);

            // Set the ellipse border color
            ellipse.Stroke = new SolidColorBrush(Colors.Red);

            // Set ellipse border thickness/width
            ellipse.StrokeThickness = 5;

            // Finally, add the ellipse to layout
            StackPanel1.Children.Add(ellipse);
        }
    }
}
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