protected override void buildParaXml(XmlWriter xmlWriter)
        {
            xmlWriter.WriteStartElement("pricing");
            xmlWriter.WriteElementString("evaluationTime", this.ReferenceDate_.ToString("yyyy-MM-dd"));
            xmlWriter.WriteElementString("itemCode", this.itemCode_);
            xmlWriter.WriteElementString("itemType", this.ItemType_);

            xmlWriter.WriteStartElement("pricingParameter");

            PricingParameterViewModel_.buildXml(xmlWriter);

            xmlWriter.WriteEndElement();
            xmlWriter.WriteEndElement();
        }
 protected override void buildParaResultXml(XmlWriter xmlWriter)
 {
     PricingParameterViewModel_.buildXml(xmlWriter);
     PricingResultViewModel_.buildXml(xmlWriter);
 }