public override void buildXml(System.Xml.XmlWriter xmlWriter)
        {
            xmlWriter.WriteStartElement("excel_schedule");
            xmlWriter.WriteElementString("type", "excel_simpleCalculation");
            xmlWriter.WriteStartElement("excel_simpleCalculation");
            excel_eventCalcInfoViewModel_.buildXml(xmlWriter);

            excel_returnCalcInfoViewModel_.buildXml(xmlWriter);

            excel_complementReturnCalcViewModel_.buildXml(xmlWriter);

            excel_eventCalcInfo_CallViewModel_.buildXml(xmlWriter);

            excel_returnCalcInfo_CallViewModel_.buildXml(xmlWriter);

            xmlWriter.WriteEndElement();
            xmlWriter.WriteEndElement();

            // 원래 꺼 만드는 코드 부분
        }