Schema specified is not valid. Errors: The relationship was not loaded because the type is not available

Question

I wish to reference the OrderAddress model twice in my Order model; once as a ShippingAddress and once as a Billing

Answer 1

This is common in self relation entities. in this case:

1-check to have ICollection, List, ... relation collection for each relation.

2-check name of relation collections.

3-in code first, check your EntityTypeConfiguration