Hi Joseph Lam,
You are right, the problem is more that we do not have the control over the objects, change tracking and lazy loading will not work, our load and store code that works without any reflection (because of speed) cannot access the internal fields of the tuple.
What you always can do with such structures that are serializable is to use the [SerializeToBlob] attribute at the field. We are then just serializing the complete content to a blob in the db.
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