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Gets the collection of axes on the chart.
IAxes Axes { get; }
ReadOnly Property Axes As IAxes
IChart chart = worksheet.Shapes.AddChart(ChartType.ColumnClustered, 20, 20, 300, 200).Chart;
IAxes axes = chart.Axes;
IAxis categoryAxis = axes.Item(AxisType.Category, AxisGroup.Primary);