private void AddIconSet11()
{
FormatConditionCollection conds = GetFormatCondition("M19:O20", Color.BlueViolet);
int idx = conds.AddCondition(FormatConditionType.IconSet);
FormatCondition cond = conds[idx];
cond.IconSet.Type = IconSetType.Rating5;
Cell c = _sheet.Cells["M19"];
c.PutValue("Rating5");
}
// This method implements the IconSet conditional formatting type with 4 Red To Black attribute.