WPF StreamGeometry

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WpfApp171
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            this.WindowState = WindowState.Maximized;
            StreamGeometryDemo();
        }

        private void StreamGeometryDemo()
        {
            Path ph = new Path();
            ph.Stroke = new SolidColorBrush(Colors.Red);
            ph.StrokeThickness = 10;

            StreamGeometry streamGeo = new StreamGeometry();
            streamGeo.FillRule = FillRule.EvenOdd;
            using (StreamGeometryContext context = streamGeo.Open())
            {
                context.BeginFigure(new Point(100, 800), true,true);
                context.LineTo(new Point(1500, 800), true, true);
                context.LineTo(new Point(1500, 100), true, true); 
            }

            streamGeo.Freeze();
            this.Title = streamGeo.GetArea().ToString();
            ph.Data=streamGeo;
            this.Content = ph;
        }
    }
}