Question

Why are we able to use automatic properties with DBSet, but not with ObjectSet:

public class SomeContext : DbContext
{        
    public DbSet<Address> Addresses { get; set; }
             ...
}

Thank you

Answer 1

DbContext is using convention over configuration paradigm. It discovers entity sets based on DbSet properties defined on the DbContext derived class (or in general, it discovers your model based on your code). ObjectContext does not do any discovery and is not convention based. It just reads your model from csdl, ssdl and msl artifacts. As a result ObjectContext requires that the user tells exactly what needs to be exposed.