WPF Графики

[CWD]

Добрый день, использую в учебном проекте бесплатный дистрибутив OxyPlot.
Не могу понять почему, ничего не отображает код

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
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;
using OxyPlot;
using OxyPlot.Axes;
using OxyPlot.Series;
 
namespace WpfApplication2
{
    public partial class MainWindow : Window
    {      
        public class Test
        {
            private PlotModel MyModel {get;set;}
            public void Draw()
            {
                LineSeries lineSeries = new LineSeries();
                MyModel = new PlotModel { Title = "Test" };
                lineSeries.Points.Add(new DataPoint(2, 2));
                lineSeries.Points.Add(new DataPoint(3, 10));
                lineSeries.Points.Add(new DataPoint(4, 16));
                lineSeries.Points.Add(new DataPoint(8, 2));
                MyModel.Series.Add(lineSeries);
            }
        }
        public MainWindow()
        {
            Test t = new Test();
            t.Draw();
        }
 
    }
}

Xaml

<Window x:Class="WpfApplication2.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:oxy="http://oxyplot.org/wpf"
        xmlns:local="clr-namespace:WpfApplication2"
        Title="Test" Height="350" Width="525">
    <Window.DataContext>
        <local:MainWindow/>
    </Window.DataContext>
    <Grid>
        <oxy:PlotView Model="{Binding MyModel}"/>
    </Grid>
</Window>

Хотя если вместо первого листинга реализовать

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
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;
using OxyPlot;
using OxyPlot.Axes;
using OxyPlot.Series;
 
namespace WpfApplication2
{
    public partial class MainWindow : Window
    {      
        public PlotModel MyModel {get;set;}
        public MainWindow()
        {
 
            LineSeries lineSeries = new LineSeries();
            MyModel = new PlotModel { Title = "Test" };
            lineSeries.Points.Add(new DataPoint(2, 2));
            lineSeries.Points.Add(new DataPoint(3, 10));
            lineSeries.Points.Add(new DataPoint(4, 16));
            lineSeries.Points.Add(new DataPoint(8, 2));
            MyModel.Series.Add(lineSeries);
        }
 
    }
}

То все отлично работает. Спасибо.