When you are working with join tables there are a few things that have to be done in order to get a handle on the necessary properties. First, when you have a join table with no payload(meaning that only two columns show up in the model, ex: UserID and GroupID) these entities will not show up in the edmx. In our example the user table will show a navigation property to the Group entity, and the Group entity will show a navigation property to the User entity Even though those navigation properties...