c# 创建xml

<?xml version="1.0" encoding="UTF-8"?>
<swUpgrade xmlns="http://www.3gpp.org/ftp/specs/archive/32_series/32.645#utranNrm" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" schemaLocation="http://www.3gpp.org/ftp/specs/archive/32_series/32.645#utranNrm swUpgrade.xsd">
  <contentBlock>
    <compatibleALDs>
      <compatibilityInformation>
        <vendorCode>VR</vendorCode>
        <aldType>aldType</aldType>
        <productNumber>productNumber</productNumber>
        <swVersion>swVersion</swVersion>
        <hwVersion>hwVersion</hwVersion>
      </compatibilityInformation>
    </compatibleALDs>
    <sw>VG9uZ1l1MTRSQ1UyLjEuMAAAAAAAAAAAAAAAAAAAAACYCwAgiSEACG03</sw>
  </contentBlock>
</swUpgrade>

 private void CreateXML(string xmlFilePath)
        {
            string xmlnsAttr= "http://www.3gpp.org/ftp/specs/archive/32_series/32.645#utranNrm";
            string xmlnsXsiAttr = "http://www.w3.org/2001/XMLSchema-instance";
            string xsiSchemaLocAttr = "http://www.3gpp.org/ftp/specs/archive/32_series/32.645#utranNrm swUpgrade.xsd";

            XmlDocument xmlDoc = new XmlDocument();
            //加入XML的声明段落
            xmlDoc.AppendChild(xmlDoc.CreateXmlDeclaration("1.0", "UTF-8", null));

           // swUpgrade
            XmlElement swUpgradeElement = xmlDoc.CreateElement("swUpgrade");
            swUpgradeElement.SetAttribute("xmlns", xmlnsAttr);
            swUpgradeElement.SetAttribute("xmlns:xsi", xmlnsXsiAttr);
            swUpgradeElement.SetAttribute("xsi:schemaLocation", xsiSchemaLocAttr);
            xmlDoc.AppendChild(swUpgradeElement);

                //contentBlock
                XmlNode contentBlockNode = xmlDoc.CreateElement("contentBlock");

                    //compatibleALDs
                    XmlNode compatibeALDsNode = xmlDoc.CreateElement("compatibleALDs");

                        //compatibilityInformation
                        XmlNode informationNode = xmlDoc.CreateElement("compatibilityInformation");
                            XmlElement vendorCodeElement = xmlDoc.CreateElement("vendorCode");
                            vendorCodeElement.InnerText = "VR";
                            XmlElement aldTypeElement = xmlDoc.CreateElement("aldType");
                            aldTypeElement.InnerText = "aldType";
                            XmlElement productNumberElement = xmlDoc.CreateElement("productNumber");
                            productNumberElement.InnerText = "productNumber";
                            XmlElement swVersionElement = xmlDoc.CreateElement("swVersion");
                            swVersionElement.InnerText = "swVersion";
                            XmlElement hwVersionElement = xmlDoc.CreateElement("hwVersion");
                            hwVersionElement.InnerText = "hwVersion";

                           informationNode.AppendChild(vendorCodeElement);
                           informationNode.AppendChild(aldTypeElement);
                           informationNode.AppendChild(productNumberElement);
                           informationNode.AppendChild(swVersionElement);
                           informationNode.AppendChild(hwVersionElement);
                   compatibeALDsNode.AppendChild(informationNode);

               contentBlockNode.AppendChild(compatibeALDsNode);

               XmlNode swNode = xmlDoc.CreateElement("sw"); ;
               swNode.InnerText = "VG9uZ1l1MTRSQ1UyLjEuMAAAAAAAAAAAAAAAAAAAAACYCwAgiSEACG03";

               contentBlockNode.AppendChild(swNode);
            swUpgradeElement.AppendChild(contentBlockNode);
            xmlDoc.Save(@"d:\test.xml");

        }