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Gets or sets the way that blank cells are plotted on the chart.
Use NotPlotted to leave blanks as gaps, Interpolated to connect adjacent points across blanks, or Zero to plot blanks as zero values.
DisplayBlanksAs DisplayBlanksAs { get; set; }
Property DisplayBlanksAs As DisplayBlanksAs
IChart chart = worksheet.Shapes.AddChart(ChartType.Line, 20, 20, 300, 200).Chart;
chart.DisplayBlanksAs = DisplayBlanksAs.Interpolated;
DisplayBlanksAs displayBlanksAs = chart.DisplayBlanksAs;