Sorry I truncated to much. The Schema is not serializable (with xsd). For 
the test just change
<xs:element name="Application" type="ApplicationElt"> 
maxOccurs="unbounded"/>
to
<xs:element name="Application" type="ApplicationElt" maxOccurs="1" 
minOccurs="1"/>
Than you can try this test yourself.

Michael

"Michael Schöller" <michael.schoeller@i...> schrieb im Newsbeitrag 
news:%2337vbNLRJHA.4680@T......
> Hi,
> I have a litte problem with an given xml-File. I've got the schema for 
> this file and generated an class with xsd.exe.
> I have truncated and simlified the files so I hope it's all clear.
> The xml-File comes in the format (FILE A)
> ---------------------------------------------------------------------------
> <?xml version="1.0"?>
> <MyFile xmlns="http://mynamespace" 
> xmlns:xsi=http://www.w3.org/2001/XMLSchema-instance>
>    <Application>
>        <Reporting xmlns="http://mynamespace/reporting">
>            <Text>Fantasy</Text>
>        </Reporting>
>    </Application>
> </MyFile>
> ---------------------------------------------------------------------------
> The xml-schema is defined as#
> ---------------------------------------------------------------------------
> <?xml version="1.0" encoding="UTF-8"?>
> <xs:schema targetNamespace="http://mynamespace" 
> xmlns:wcr="http://mynamespace/reporting" xmlns="http://mynamespace" 
> xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" 
> attributeFormDefault="unqualified">
>    <xs:import namespace="http://mynamespace/reporting" 
> schemaLocation="mynamespace.Reporting.xsd"/>
>    <xs:element name="MyFile">
>        <xs:complexType>
>            <xs:sequence>
>                <xs:element name="Application" type="ApplicationElt" 
> maxOccurs="unbounded"/>
>            </xs:sequence>
>        </xs:complexType>
>    </xs:element>
>    <xs:complexType name="ApplicationElt">
>        <xs:sequence>
>            <xs:element ref="Message" minOccurs="0" maxOccurs="unbounded"/>
>        </xs:sequence>
>    </xs:complexType>
>    <xs:element name="Message" type="MessageBaseElt"/>
>    <xs:complexType name="MessageBaseElt" abstract="true"/>
> </xs:schema>
> ---------------------------------------------------------------------------
> <?xml version="1.0" encoding="UTF-8"?>
> <xs:schema targetNamespace="http://mynamespace/reporting" 
> xmlns:wcb="http://mynamespace" xmlns="http://mynamespace/reporting" 
> xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" 
> attributeFormDefault="unqualified">
>    <xs:import namespace="http://mynamespace" 
> schemaLocation="mynamespace.xsd"/>
>    <xs:complexType name="ReportingMessageElt">
>        <xs:complexContent>
>            <xs:extension base="wcb:MessageBaseElt">
>                <xs:sequence>
>                    <xs:element name="Text" type="xs:string"/>
>                </xs:sequence>
>            </xs:extension>
>        </xs:complexContent>
>    </xs:complexType>
>    <xs:element name="Reporting" type="ReportingMessageElt" 
> substitutionGroup="wcb:Message"/>
> </xs:schema>
> ---------------------------------------------------------------------------
> If I try to serialize this class the file that is generatet looks like 
> (FILE B)
> ---------------------------------------------------------------------------
> <?xml version="1.0"?>
> <MyFile xmlns="http://mynamespace" 
> xmlns:xsi=http://www.w3.org/2001/XMLSchema-instance>
>    <Application>
>        <Reporting xmlns:q1="http://mynamespace/reporting">
>            <q1:Text>Fantasy</q1:Text>
>        </Reporting>
>    </Application>
> </MyFile>
> ---------------------------------------------------------------------------
> I tested both files with 3 different xml Validators and all files are 
> valid.
> However when deserializing FILE B all works well and after MyFile x = 
> (MyFile)serial.Deserialize(fs);
> x.Application[0].Message[0] holds an Reporting object with the data.
> When deserializing FILE A x.Application[0].Message is null and no 
> exception is raised that gives an hint to the Problem.
>
> Did I do something wrong?
>
> Just do be sure. There is nothing I can do about the xml-File (FILE A) so 
> I have to get this to work with changes in the generated class or the 
> xml-Schema.
>
> Thanks
> Michael
>