This print for content only-size & color not accurate 7" X 9-1/4" / casebound / malloy

// This would be a compile-time error!

// myPeople.AddPerson(new Car());

foreach (Person p in myPeople)

Console.WriteLine(p);

Console.ReadLine();

}

While custom collections do ensure type safety, this approach leaves you in a position where

you must create an (almost identical) custom collection for each type you wish to contain. Thus, if

you need a custom collection that will be able to operate only on classes deriving from the Car base

class, you need to build a very similar type:

public class CarCollection : IEnumerable

{

private ArrayList arCars = new ArrayList();

public CarCollection(){}