Chapter 7

1. The BCL namespace containing the generic collections is System.Collections.Generic.
2. The base interface for all the other interfaces that define functionalities for generic collections is IEnumerable<T>.
3. Generic collections are preferred over non-generic ones because they offer the benefit of type safety, have better performance for value types (because they avoid boxing and unboxing), and, in some cases, they provide functionalities not available in the non-generic collections.
4. The List<T> generic class represents a collection of elements that can be accessed by their index. List<T> is very similar to arrays, except that the size of the collection is not fixed but is variable and it can grow or decrease as elements are added or removed. You add elements with Add(), AddRange(), Insert(), and InsertRange(). You can remove elements with Remove(), RemoveAt(), RemoveRange(), RemoveAll(), and Clear().
5. The Stack<T> generic class represents...