Merge branch 'main' into alzollin/nativeaot

Author: azchohfi

AIDevGallery/Samples/Open Source Models/Image Models/FaceDetLite/FaceDetection.xaml.cs

@@ -88,14 +88,20 @@ private void FrameRateTimer_Tick(object? sender, object e)
         }
     }
 
-    private void FaceDetectionUnloaded(object sender, RoutedEventArgs e)
+    private async void FaceDetectionUnloaded(object sender, RoutedEventArgs e)
     {
         lock (this)
         {
             _inferenceSession?.Dispose();
             _inferenceSession = null;
             _latestVideoFrame?.Dispose();
+
+            CameraPreviewControl.CameraHelper.FrameArrived -= CameraPreviewControl_FrameArrived!;
+            CameraPreviewControl.PreviewFailed -= CameraPreviewControl_PreviewFailed!;
+            CameraPreviewControl.Stop();
         }
+
+        await CameraPreviewControl.CameraHelper.CleanUpAsync();
     }
 
     protected override async Task LoadModelAsync(SampleNavigationParameters sampleParams)

AIDevGallery/Samples/WCRAPIs/LiveImageDescription.xaml.cs

@@ -39,9 +39,22 @@ internal sealed partial class LiveImageDescription : BaseSamplePage
 
     public LiveImageDescription()
     {
+        this.Unloaded += LiveImageDescriptionUnloaded;
         this.InitializeComponent();
     }
 
+    private async void LiveImageDescriptionUnloaded(object sender, RoutedEventArgs e)
+    {
+        lock (this)
+        {
+            CameraPreviewControl.CameraHelper.FrameArrived -= CameraPreviewControl_FrameArrived!;
+            CameraPreviewControl.PreviewFailed -= CameraPreviewControl_PreviewFailed!;
+            CameraPreviewControl.Stop();
+        }
+
+        await CameraPreviewControl.CameraHelper.CleanUpAsync();
+    }
+
     protected override async Task LoadModelAsync(SampleNavigationParameters sampleParams)
     {
         if (!ImageDescriptionGenerator.IsAvailable())