AppStartupGuide.Extensions.IsItemVisible C# (CSharp) Метод

        public static bool IsItemVisible(this FrameworkElement container, FrameworkElement element)
        {
            var elementBounds = element.TransformToVisual(container).TransformBounds(new Rect(0, 0, element.ActualWidth, element.ActualHeight));
            var containerBounds = new Rect(0, 0, container.ActualWidth, container.ActualHeight);

            return (elementBounds.Top < containerBounds.Bottom && elementBounds.Bottom > containerBounds.Top);
        }