[]
Gets the ISparkColor object that represents the color and visibility of markers for negative points of data on a sparkline.
Use this object to configure how negative data points are displayed in the sparkline group.
ISparkColor Negative { get; }
ReadOnly Property Negative As ISparkColor
worksheet.Range["A1:A4"].Value = new object[,] {
{10},
{-5},
{8},
{-3}
};
ISparklineGroup group = worksheet.Range["B1"].SparklineGroups.Add(SparkType.Line, "A1:A4");
ISparkColor negative = group.Points.Negative;
negative.Color.RGB = Color.Red;
negative.Visible = true;