[]
Designates all the formulas of the range to be recalculated when the next calculation occurs.
void Dirty()
Sub Dirty()
IRange formulaCell = worksheet.Range["B1"];
worksheet.Range["A1"].Value = 10;
formulaCell.Formula = "=A1*2";
formulaCell.Dirty();
formulaCell.Calculate();
object value = formulaCell.Value;