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Gets or sets the custom maximum value for the vertical axis of a sparkline.
Use this property to set or retrieve the manual maximum axis value after the maximum scale type has been set to SparkScaleCustom.
double CustomMaxScaleValue { get; set; }
Property CustomMaxScaleValue As Double
worksheet.Range["A1:A4"].Value = new object[,] {{2}, {5}, {3}, {7}};
ISparklineGroup group = worksheet.Range["B1"].SparklineGroups.Add(SparkType.Line, "A1:A4");
ISparkVerticalAxis verticalAxis = group.Axes.Vertical;
verticalAxis.MaxScaleType = SparkScale.SparkScaleCustom;
verticalAxis.CustomMaxScaleValue = 10;
double maxScaleValue = verticalAxis.CustomMaxScaleValue;