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Gets or sets the parent data label option for the specified series within the chart group.
This property indicates how parent data labels are displayed for a series that supports parent labels.
ParentDataLabelOptions ParentDataLabelOption { get; set; }
Property ParentDataLabelOption As ParentDataLabelOptions
worksheet.Range["A1:B4"].Value = new object[,] {{"Group", "Value"}, {"North", 10}, {"South", 20}, {"East", 15}};
IChart chart = worksheet.Shapes.AddChart(ChartType.Treemap, 20, 20, 300, 200).Chart;
chart.SourceData = worksheet.Range["A1:B4"];
ISeries series = chart.SeriesCollection[0];
series.ParentDataLabelOption = ParentDataLabelOptions.Banner;
ParentDataLabelOptions option = series.ParentDataLabelOption;