//Visual Basic 2010 Redefinition - Overridable en Overrides Object Oriented Programming
public class Exercise3Task {
    void Main() {
        Airport airport1 = new Airport("ZAV", "Brussels");
        Airport airport2 = new Airport("NYK", "New York Kennedy");
        Flight flight1 = new Flight(airport1, airport2);
        Flight flight2 = new Flight(airport2, airport1);
        Holiday holiday1 = new Holiday();
        holiday1.Add(flight1);
        holiday1.Add(flight2);
        Console.WriteLine(holiday1.Item(index).ToString());
        Console.ReadLine();
    }
}
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