Find nearest datapoint in series using touch point from chart area

private void Chart_PointerMoved(object sender, PointerRoutedEventArgs e)
        {
            FieldInfo feild = typeof(ChartBase).GetField("AdorningCanvas", BindingFlags.NonPublic | BindingFlags.Instance);
            UIElement canvas = feild.GetValue(Chart) as UIElement;
            var pointer = e.GetCurrentPoint(canvas);
            double xvalue = pointer.Position.X;
            double yvalue = pointer.Position.Y;
            double stackvalue = double.NaN;
            Point point = new Point(xvalue, yvalue);
            Chart.Series[0].FindNearestChartPoint(point, out xvalue, out yvalue, out stackvalue);
 
            textblock.Text = "Nearest X Point is " + xvalue.ToString();
            textblock1.Text = "Nearest Y Point is " + yvalue.ToString();
        }