WPF MediaElement LoadedBehavior Manual Play

using System;
using System.Collections.Generic;
using System.Linq;
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 WpfApp126
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        private double width, height;
        public MainWindow()
        {
            InitializeComponent();
            WindowState = WindowState.Maximized;
            WindowStyle = WindowStyle.None;
            this.Loaded += MainWindow_Loaded;
        }

        private void MainWindow_Loaded(object sender, RoutedEventArgs e)
        {
            width = this.ActualWidth;
            height = this.ActualHeight;
            MediaPlayerPlay();
        }

        private void MediaPlayerPlay()
        {
            MediaElement mediaElement = new MediaElement();
            mediaElement.Width= width;
            mediaElement.Height= height;            
            mediaElement.LoadedBehavior = MediaState.Manual;
            mediaElement.Source = new Uri(@"D:\C\WpfApp126\WpfApp126\Video\v1.wmv");
            mediaElement.Play();
            this.Content= mediaElement;
        }
    }
}