Windows.UI.Xaml.UIElement.TransformToVisual C# (CSharp) Method

		public extern GeneralTransform TransformToVisual([In] UIElement visual);
		public extern void InvalidateMeasure();

        public static double DistanceFromTop(this ScrollViewer scrollViewer, UIElement element)
        {
            var transform = element.TransformToVisual(scrollViewer);
            var position = transform.TransformPoint(new Point(0, 0));

            return position.Y;
        }