private async void FlipCardFaceUp()

in Games/Memory/GamePage.xaml.cs [249:308]
50 lines of code
3 McCabe index (conditional complexity)

        private async void FlipCardFaceUp(Button btn)
        {
            //Flip button visual
            var btnVisual = ElementCompositionPreview.GetElementVisual(btn);
            var compositor = btnVisual.Compositor;

            //Get a visual for the content
            var btnContent = VisualTreeHelper.GetChild(VisualTreeHelper.GetChild(btn, 0), 0);
            var btnContentVisual = ElementCompositionPreview.GetElementVisual(btnContent as FrameworkElement);

            var easing = compositor.CreateLinearEasingFunction();

            if (_flipBatchAnimation != null)
            {
                _flipBatchAnimation.Completed -= FlipBatchAnimation_Completed;
                _flipBatchAnimation.Dispose();
            }

            _flipBatchAnimation = compositor.CreateScopedBatch(CompositionBatchTypes.Animation);
            _flipBatchAnimation.Completed += FlipBatchAnimation_Completed;

            ScalarKeyFrameAnimation flipAnimation = compositor.CreateScalarKeyFrameAnimation();
            flipAnimation.InsertKeyFrame(0.000001f, 180);
            flipAnimation.InsertKeyFrame(1f, 0, easing);
            flipAnimation.Duration = TimeSpan.FromMilliseconds(800);
            flipAnimation.IterationBehavior = AnimationIterationBehavior.Count;
            flipAnimation.IterationCount = 1;
            btnVisual.CenterPoint = new Vector3((float)(0.5 * btn.ActualWidth), (float)(0.5f * btn.ActualHeight), 0f);
            btnVisual.RotationAxis = new Vector3(0.0f, 1f, 0f);

            ScalarKeyFrameAnimation appearAnimation = compositor.CreateScalarKeyFrameAnimation();
            appearAnimation.InsertKeyFrame(0.0f, 0);
            appearAnimation.InsertKeyFrame(0.599999f, 0);
            appearAnimation.InsertKeyFrame(0.6f, 0.5f);
            appearAnimation.InsertKeyFrame(1f, 1);
            appearAnimation.Duration = TimeSpan.FromMilliseconds(800);
            appearAnimation.IterationBehavior = AnimationIterationBehavior.Count;
            appearAnimation.IterationCount = 1;

            btnVisual.StartAnimation(nameof(btnVisual.RotationAngleInDegrees), flipAnimation);
            btnContentVisual.StartAnimation(nameof(btnContentVisual.Opacity), appearAnimation);
            _flipBatchAnimation.End();

            if (_usePictures)
            {
                var file = await StorageFile.GetFileFromPathAsync(btn.Tag.ToString());
                using (var stream = await file.OpenAsync(FileAccessMode.Read))
                {
                    var image = new Image();
                    var bmp = new BitmapImage();
                    await bmp.SetSourceAsync(stream);
                    image.Source = bmp;
                    btn.Content = image;
                }
            }
            else
            {
                btn.Content = btn.Tag.ToString();
            }
        }