使用 XSD 的 XML 验证得到无效的子元素错误，我不知道为什么

使用以下方法，我总是得到一个无效的子元素错误。我是XML的新手，我一直在网上寻找试图解决这个问题，但没有运气。我有另一个XSD正在验证提交给我的应用程序的XML，它工作得很好，但它使用属性而不是元素。无法使用 XSD 中的元素来验证通过我无法控制的第三方应用程序提交的 XML。

XSD

<?xml version="1.0" encoding="Windows-1252"?>
<xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified"     xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:element name="SCCAParticipationList">
    <xs:complexType>
      <xs:sequence>
        <xs:element maxOccurs="unbounded" name="Entry">
          <xs:complexType>
            <xs:sequence>
              <xs:element name="Address" type="xs:string" minOccurs="0" />
              <xs:element name="CarModel" type="xs:string" minOccurs="0" />
              <xs:element name="CarNo" type="xs:string" minOccurs="0" />
              <xs:element name="TotalTm" type="xs:string" minOccurs="0" />
              <xs:element name="BestTm" type="xs:string" minOccurs="0" />
              <xs:element name="Region" type="xs:string" minOccurs="0" />
              <xs:element name="MemberNo" type="xs:string" minOccurs="1" />
              <xs:element name="FirstName" type="xs:string" minOccurs="1" />
              <xs:element name="LastName" type="xs:string" minOccurs="1" />
              <xs:element name="Class" type="xs:string" minOccurs="1" />
              <xs:element name="Pos" type="xs:string" minOccurs="1" />
              <xs:element name="UniqueID" type="xs:string" minOccurs="0" />
            </xs:sequence>
          </xs:complexType>
        </xs:element>
      </xs:sequence>
    </xs:complexType>
  </xs:element>
</xs:schema>

    
.XML     

<?xml version="1.0"?>
<SCCAParticipationList>
  <Entry>
    <MemberNo>3333333</MemberNo>
    <FirstName>Test</FirstName>
    <LastName>Person</LastName>
    <Class>stt</Class>
    <Pos>13</Pos>
    <CarModel>Mazda Miata</CarModel>
    <Address>123 Test Dr ,The Woodlands TX,55555,US</Address>
  </Entry>
  <Entry>
    <MemberNo>2222222</MemberNo>
    <FirstName>John</FirstName>
    <LastName>Doe</LastName>
    <Class>sio</Class>
    <Pos>3T</Pos>
    <CarModel>Subaru Impreza</CarModel>
    <Address>111 Test Circle ,Austin TX,77777,US</Address>
  </Entry>
</SCCAParticipationList>

    

    
C#     

protected Boolean VerifyXmlwElements(string strSchemaPath, string strXml)
        {
            try
            {

                byte[] byteArray = Encoding.ASCII.GetBytes(strXml);
                MemoryStream stream = new MemoryStream(byteArray);
                XmlTextReader xmlr = new XmlTextReader(stream);
                XmlValidatingReader xmlvread = new XmlValidatingReader(xmlr);
                xmlvread.Schemas.Add(null, strSchemaPath);
            xmlvread.ValidationEventHandler += new ValidationEventHandler(ValidationCallBack);
            while (xmlvread.Read()) { }
            xmlvread.Close();
            if (intErrCount > 0)
            {
                intErrCount--;
                throw new Exception(strErrMessage);
            }
            strErrMessage = "XML validation succeeded!'r'n";
            return true;
        }
        catch (Exception ex)
        {
            intErrCount++;
            strErrMessage = "Invalid XML - " + ex.Message + intErrCount.ToString() + " Error(s)'r'n";
            return false;
        }
    }
    private void ValidationCallBack(Object sender, ValidationEventArgs args)
    {
        if (args.Message.ToLower().Contains("attribute is not declared"))
        {
            return;
        }
        intErrCount++;
        return;
    }