.Net XmlValidatingRe ader should fail on complextypes with whitespace?

[Larry]

I believe the .Net XmlValidatingRe ader should fail when validating XML
that contains a ComplexType element with white space when the
ComplexType element has the mixed attribute set to false in the XSD used
for validation.

XSD fragment:

<xs:element name="TRSellerB uyerData">
<xs:complexTy pe mixed="false">
<xs:sequence>
<xs:element ref="BuyerSelle rReferrorFlag" minOccurs="0"
maxOccurs="unbo unded"/>
</xs:sequence>
</xs:complexType>
</xs:element>

XML fragment:

<TRSellerBuyerD ata>
</TRSellerBuyerDa ta>

XML Spy will catch the valdation error and report: "Text not allowed
inside element 'TRSellerBuyerD ata'

But the following code does not catch the validation error. Is this a
bug in XmlValidatingRe ader - or am I missing code to catch this? I
assume by XSD is correct since XmlSpy catches the error.
XmlTextReader textReader = new XmlTextReader(r eader);

textReader.Whit espaceHandling = WhitespaceHandl ing.All; //this is the
default

textReader.Norm alization = false; //this is the default

XmlValidatingRe ader validatingReade r = new XmlValidatingRe ader(textReader );

validatingReade r.ValidationTyp e = ValidationType. Schema;

validatingReade r.Schemas.Add(s chemaCollection );

try
{
while(validatin gReader.Read()) ;
}
catch(Exception ex)
{
Debug.WriteLine (ex.Message);
}
-Larry