XML Schema Coverted To C# Class

I am trying to take a XML Schema and covert the relationships to C# classes. The situation I am running into is as follows:

I have a complex type in the schema which has 4 elements all of a certain type:

<xs:complexType name="ReportingBaseType" abstract="true">
    <xs:sequence>
        <xs:element name="Category" type="ent:ReportingCategoryConceptType" minOccurs="0" maxOccurs="0"/>
        <xs:element name="Frequency" type="ent:ReportingFrequencyType"/>
        <xs:element name="AdjustmentFrequency" type="ent:ReportingAdjustmentFrequencyType"/>
        <xs:element name="FirstReportDueDate" type="ent:CXMLDateType" minOccurs="0" maxOccurs="0"/>
    </xs:sequence>

</xs:complexType>

Next, I have multiple complextypes that can restrict or extend this type:

<xs:complexType name="ReportingClassA">
   <xs:restriction base="ReportingBaseType">
    <xs:sequence>
        <xs:element name="Category" type="ent:ReportingClassAType" minOccurs="0" maxOccurs="0"/>
        <xs:element name="Frequency" type="ent:FequencyForThisClassType"/>
    </xs:sequence>
   </restriction>
</xs:complexType>

<xs:complexType name="ReportingClassB">
   <xs:restriction base="ReportingBaseType">
    <xs:sequence>
        <xs:element name="Category" type="ent:NewTypeForThisClass" minOccurs="0" maxOccurs="0"/>
        <xs:element name="Frequency" type="ent:AnotherNewType"/>
        <xs:element name="AdjustmentFrequency" type="ent:ThisIsADifferntTypeThenParent"/>
        <xs:element name="FirstReportDueDate" type="ent:AndAnotherNewType" minOccurs="0" maxOccurs="
    </xs:sequence>
  </restriction>
</xs:complexType>

How can I (in C#) derive from the parent class (ReportingBaseType) but have different types for the properties like they are defined in the Schema?

I have thought of using the new keyword when defining my properties on the derived classes to "hide" the inherited members but I have heard that when serializing this object that the XML Serializer may not handle this correctly.

Does anyone have any advice how to correctly relate my schema to C# classes and still be able to serialize my c# objects to correct XML object that will pass the XML Schema Validation?

EDIT: I have tried using Xsd2Code and the built in xsd.exe tool to handle the correct c# classes but they do not generate the detail that I need. Especially in the circumstances that I have described above.