如何在XML序列化上有条件地忽略某些字段

Question

我正在尝试编写一个应该将类序列化为XML文件的程序，但最近我的规范发生了变化，现在我有一个以前唯一且非空字段改变如下：

• 正常情况，与之前一样，字段不会更改[a，b，c]
• n个字段，带有指向另一个字段ID [a，b，c，id]
的链接

如何更改课程以允许此类行为？

实际值：

    <Serializable>
    Public Class DataType
        Public FieldToChange As New FieldType 'FieldType to change
    End Class

    <Serializable>
    Public class FieldType
        Public a As Integer
        Public b As Integer
        Public c As Integer
    End Class

未来：

    <Serializable>
    Public Class ClassWithElemToChangeType
        <XmlElement("FieldType")> ' Is it right?
        Public FieldToChange As New List(Of FieldType)
    End Class

    <Serializable>
    Public class FieldType
        Public a As Integer
        Public b As Integer
        Public c As Integer
        Public id As Integer
        ' How can i add a field that gets ignored whenever is null
        ' or how can I programmatically tell my serializer to ignore
    End Class