PhoneBook – This extends the PhoneBook class by ensuring that duplicate phone numbers are not added to the collection.
Registrar – The Registrar class is responsible to support the enrollment of students. This class maintains the student body as a collection of Student objects. It supports the ability to find and remove students, switch students to another program, and get the number of students enrolled in a specific program.
BookBag – The BookBag class represents a simple “shopping cart” for a book consignment store. Books are sold on consignment, and customers can add or remove books from their BookBag as well as search their BookBag for books by ISBN. Customers can also see the total price of the items in their BookBag.
DeckOfCards –The DeckOfCards class represents a complete deck of cards. When the deck is first created, a card is created for each suit. The DeckOfCards supports two public methods: Draw() and Shuffle().