public static async Task SlideAndFadeOutToLeftAsync(this FrameworkElement element, float seconds = 0.3f, bool keepMargin = true, int width = 0)
{
var storyBoard = new Storyboard();
storyBoard.RemoveSlideToLeft(seconds, width == 0 ? element.ActualWidth : width, keepMargin: keepMargin);
storyBoard.AddFadeOutAugment(seconds);
storyBoard.Begin(element);
element.Visibility = Visibility.Visible;
await Task.Delay((int)seconds * 1000);
}
public static async Task SlideAndFadeOutToRightAsync(this Page page, float seconds, bool keepMargin = true)
{
var storyBoard = new Storyboard();
storyBoard.RemoveSlideToRight(seconds, page.WindowWidth, keepMargin: keepMargin);
storyBoard.AddFadeOutAugment(seconds);
storyBoard.Begin(page);
page.Visibility = Visibility.Visible;
await Task.Delay((int)seconds * 1000);
}