private void ShowAnimatedOverlay()
        {
            if (OverlayGrid is null)
            {
                throw new InvalidOperationException("Cannot find overlay in Associated object");
            }

            if (OverlayGrid.Visibility == Visibility.Visible && _overlayStoryboard is null)
            {
                return;
            }

            if (ActiveContentContainer.Visibility == Visibility.Hidden)
            {
                ActiveContentContainer.SetCurrentValue(UIElement.VisibilityProperty, Visibility.Visible);
            }

            Dispatcher.VerifyAccess();

            var storyboard = AnimationService.GetFadeInAnimation(OverlayGrid);

            _overlayStoryboard = storyboard;

            if (TryGetOverlayFadingStoryboardAnimation(storyboard, out var animation))
            {
                OverlayGrid.SetCurrentValue(UIElement.VisibilityProperty, Visibility.Visible);

                animation.SetCurrentValue(DoubleAnimation.ToProperty, (double?)0.7);

                EventHandler completionHandler = null;
                completionHandler = (sender, args) =>
                {
                    storyboard.Completed -= completionHandler;
                    if (_overlayStoryboard == storyboard)
                    {
                        _overlayStoryboard = null;
                    }
                };

                storyboard.Completed += completionHandler;
                OverlayGrid.BeginStoryboard(storyboard);
            }
            else
            {
                ShowOverlay();
            }
        }
 private void HideActiveContainer()
 {
     ActiveContentContainer.SetCurrentValue(UIElement.VisibilityProperty, Visibility.Hidden);
 }