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Gets or sets whether negative bubbles are shown for the chart group.
This property is valid only for bubble charts.
bool ShowNegativeBubbles { get; set; }
Property ShowNegativeBubbles As Boolean
IChart chart = worksheet.Shapes.AddChart(ChartType.Bubble, 20, 20, 300, 200).Chart;
IChartGroup chartGroup = chart.ChartGroups[0];
chartGroup.ShowNegativeBubbles = true;
bool showNegativeBubbles = chartGroup.ShowNegativeBubbles;