Public Class VisualAxisRange
An instance of the VisualAxisRange class can be obtained via the AxisBase.VisualRange property, which defines the visible range of axis values. The AxisBase.WholeRange property defines the whole available range of values that can be displayed on an axis.
So, if the VisualRange is equal to the WholeRange, no scrolling and zooming is applied to chart data. And, if the VisualRange is less than the WholeRange, chart data is zoomed in and scrolled.