static void Main(string[] args)
{
//Success met de opdracht!
TelephoneBook book = new TelephoneBook();
List <IPerson> lastNameBook = book.SortByLastName();
Console.WriteLine("### Sorted by Lastname ###");
Print(lastNameBook);
List <IPerson> firstCharBook = book.FirstNameStartWith('B');
Print(firstCharBook);
List <IPerson> lengthBook = book.LastNameLongerThan(5);
Print(lengthBook);
List <IPerson> orderLastNameBook = book.SortByLastNameLength();
Print(orderLastNameBook);
Console.ReadLine();
}