C#中序列化派生类的问题

[Serializable]
public class BaseClass
{
    public int BaseProperty { get; set; }

    [NonSerialized]
    private string _nonSerializedField;
}

[Serializable]
public class DerivedClass : BaseClass
{
    public int DerivedProperty { get; set; }

    public override void GetObjectData(SerializationInfo info, StreamingContext context)
    {
        base.GetObjectData(info, context);
        info.AddValue("DerivedProperty", DerivedProperty);
    }

    protected override void OnDeserialized(StreamingContext context)
    {
        base.OnDeserialized(context);
        DerivedProperty = (int)context.Context;
    }
}