private void AddIconSet4()
{
FormatConditionCollection conds = GetFormatCondition("M5:O6", Color.Aqua);
int idx = conds.AddCondition(FormatConditionType.IconSet);
FormatCondition cond = conds[idx];
cond.IconSet.Type = IconSetType.Arrows5;
Cell c = _sheet.Cells["M5"];
c.PutValue("Arrows5");
}
// This method implements the IconSet conditional formatting type with 3 Arrows Gray attribute.