在.NET XML反序列化中，如何允许多态使用Array类型？

Example Schema:

<complexType name="Dog">...</complexType>
<complexType name="Cat">...</complexType>

<complexType name="ArrayOfDog">
    <sequence>
        <element name="Dog" type="tns:Dog minOccurs="0" maxOccurs="unbounded" />
    </sequence>
</complexType>

<complexType name="Foo">
    <sequence>
        <element name="Bar" type="string"/>          
        <element name="Baz" type="anyType"/>
    </sequence>
</complexType>
<complexType name="Dog">...</