To demonstrate another approach to a m:m with List Boxes instead of Checkboxes, we will add a new m:m for Doctor Specialties.
0:00 Review "No Load" m:m
1:00 UI Considerations for m:m
5:20 Example - Doctor specialty m:m
5:50 Bootstrap Collapse & Grid system
7:50 Add Classes for m:m
11:20 DbContext changes
14:00 Seed Data
20:40 Migrations
23:15 Test Run - UI not changed but the data is there
