public void RemoveFormula()
 {
     this._Formula = null;
 }
 public void RemoveFormula()
 {
     _Formula = null;
 }
 public void CreateFormula()
 {
     this._Formula = new CellFormulaProxy(this._wscache);
 }
 public void CreateFormula()
 {
     _Formula = new CellFormulaProxy(_wscache);
 }