static void Main(string[] args)
        {
            Logistics r = new RoadLogistics();
            Logistics s = new SeaLogistics();

            r.PlanDelivery();
            Console.WriteLine();
            Console.WriteLine();
            Console.WriteLine();
            Console.WriteLine();
            s.PlanDelivery();
        }
        static void FactoryMethodExample()
        {
            var roadLogistics = new RoadLogistics();

            roadLogistics.PlanDelivery();
            var truck = roadLogistics.FactoryMethod();

            var seaLogistics = new SeaLogistics();

            seaLogistics.PlanDelivery();
            var ship = seaLogistics.FactoryMethod();
        }