XmlSerializing Base Classes

[farseer]

let's say i have the following class that was generated using XSD.exe:

[System.CodeDom. Compiler.Genera tedCodeAttribut e("xsd",
"2.0.50727. 26")]
[System.Serializ ableAttribute()]
[System.Diagnost ics.DebuggerSte pThroughAttribu te()]
[System.Componen tModel.Designer CategoryAttribu te("code")]
[System.Xml.Seri alization.XmlTy peAttribute(Ano nymousType=true )]
[System.Xml.Seri alization.XmlRo otAttribute(Nam espace="com.tes t.ns",
IsNullable=fals e)]
public class MyBaseClass {
private string nameField;

/// <remarks/>
public string name{
get {
return this.nameField;
}
set {
this.nameField= value;
}
}

Now let's say in my app I extend this class so that i can add methods
to it without having to touch the autogenerated class:

public class MyClass1: MyBaseClass
{
public MyBaseClass getMyBaseClass {
return (MyBaseClass) this;

public void doSomething( ){...}
}

When i serialize this i'd like MyBaseClass to be serialized (i.e.the
name "MyBaseClas s" should be the root element of the XML), so i added a
method called getMyBaseClass which returns the base Class (as shown in
the code above). i then do this to serialize:

XmlSerializerNa mespaces xsNs = New XmlSerializerNa mespaces()
xsNs.Add("n1", "com.test.n s")

MyClass1 myClass = new MyClass1( )
MyBaseClass myBase = myClass.getMyBa seClass( )
XmlSerializer xs = new XmlSerializer( GetType( MyBaseClass ) )
StringWriter sw = new StringWriter( )
xs.Serialize( sw, myBase, xsNs )

However, it appears when i attempt to do this, the serializer is
complaining: "System.Invalid OperationExcept ion: There was an error
generating the XML document. ---> System.InvalidO perationExcepti on: The
type com.test.ns.MyC lass was not expected. Use the XmlInclude or
SoapInclude attribute to specify types that are not known statically."

WHAT AMI DOING WRONG? or how can i fix?

[farseer]

Re: XmlSerializing Base Classes

i have solved this by using encapsulation and delegation (rather than
extending MyBaseClass, i create a private member of that type), but it
would be VERY NICE to understand why extension is not able to work
here.

i seem to having a lot of problems with serialization and
deserialization .