WPF Sample: Use VideoView.Loaded event to set mediaplayer

Samples/LibVLCSharp.WPF.Sample/Controls.xaml.cs

@@ -17,12 +17,13 @@ namespace LibVLCSharp.WPF.Sample
 
             InitializeComponent();
 
-            Loaded += Controls_Loaded;
+            // we need the VideoView to be fully loaded before setting a MediaPlayer on it.
+            parent.VideoView.Loaded += VideoView_Loaded;
             PlayButton.Click += PlayButton_Click;
             StopButton.Click += StopButton_Click;
         }
 
-        private void Controls_Loaded(object sender, RoutedEventArgs e)
+        private void VideoView_Loaded(object sender, RoutedEventArgs e)
         {
             _libVLC = new LibVLC();
             _mediaPlayer = new MediaPlayer(_libVLC);

Samples/LibVLCSharp.WPF.Sample/Example2.xaml.cs

@@ -28,7 +28,8 @@ namespace LibVLCSharp.WPF.Sample
             _libVLC = new LibVLC();
             _mediaPlayer = new MediaPlayer(_libVLC);
 
-            VideoView.MediaPlayer = _mediaPlayer;
+            // we need the VideoView to be fully loaded before setting a MediaPlayer on it.
+            VideoView.Loaded += (sender, e) => VideoView.MediaPlayer = _mediaPlayer;
         }
         
         void StopButton_Click(object sender, RoutedEventArgs e)