如果我在子类中实现ISerializable，父母也必须这样做吗？

I have to implement ISerializable in a derived class (to do some custom serialization/deserialization) but the parent class is marked as [Serializable]. The serialization "works" (I can serialize and deserialize without runtime errors) but it looks like the base class data isn't being preserved. I have to implement ISerializable in a derived