static void Main(string[] args) {
            PersonCollection myPeople = new PersonCollection();

            myPeople["Homer"] = new Person("Homer", "Simpson", 40);
            myPeople["Marge"] = new Person("Marge", "Simpson", 38);

            Person homer = myPeople["Homer"];
            Console.WriteLine(homer);

            Console.ReadLine();
        }
        static void Main(string[] args)
        {
            Console.WriteLine("***** Fun with Indexers *****\n");
            PeopleCollection myPeople = new PeopleCollection();
            myPeople["Homer"] = new Person("Homer", "Simpson", 40);
            myPeople["Marge"] = new Person("Marge", "Simpson", 38);

            Person homer = myPeople["Homer"];
            Console.WriteLine(homer.ToString());
            Console.ReadLine();
        }
        static void Main(string[] args)
        {
            Console.WriteLine("***** Fun with Indexers ****\n");

            PersonCollection myPeople = new PersonCollection();

            myPeople["Homer"] = new Person("Homer", "Simpson", 40);
            myPeople["Marge"] = new Person("Marge", "Simpson", 38);

            // Get "Homer" and print data.
            Person homer = myPeople["Homer"];
            Console.WriteLine(homer.ToString());

            Console.WriteLine();
            MultiIndexerWithDataTable();

            Console.ReadLine();
        }