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Gets the IDisplayUnitLabel object for this axis.
The display unit label shows the unit specified by DisplayUnit or DisplayUnitCustom on the axis. Returns null if HasDisplayUnitLabel is false.
IDisplayUnitLabel DisplayUnitLabel { get; }
ReadOnly Property DisplayUnitLabel As IDisplayUnitLabel
IChart chart = worksheet.Shapes.AddChart(ChartType.ColumnClustered, 20, 20, 300, 200).Chart;
IAxis axis = chart.Axes.Item(AxisType.Value, AxisGroup.Primary);
axis.DisplayUnit = DisplayUnit.Thousands;
IDisplayUnitLabel displayUnitLabel = axis.DisplayUnitLabel;