private void AddIconSet3()
{
FormatConditionCollection conds = GetFormatCondition("M3:O4", Color.AntiqueWhite);
int idx = conds.AddCondition(FormatConditionType.IconSet);
FormatCondition cond = conds[idx];
cond.IconSet.Type = IconSetType.Arrows4;
Cell c = _sheet.Cells["M3"];
c.PutValue("Arrows4");
}
// This method implements the IconSet conditional formatting type with 5 Arrows Colored attribute.