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Gets or sets whether the embedded chart has rounded corners.
bool RoundedCorners { get; set; }
Property RoundedCorners As Boolean
IChart chart = worksheet.Shapes.AddChart(ChartType.ColumnClustered, 20, 20, 300, 200).Chart;
IChartArea chartArea = chart.ChartArea;
chartArea.RoundedCorners = true;
bool roundedCorners = chartArea.RoundedCorners;