static void Main(string[] args)
        {
            //Client Code
            IMachineFactory factory = new HighBudgetMachine();// Or new LowBudgetMachine();
            ComputerShop    shop    = new ComputerShop(factory);

            shop.AssembleMachine();
            Console.ReadKey();
        }
        private static void Builder()
        {
            var             computerShop = new ComputerShop();
            ComputerBuilder computerBuilder;

            computerBuilder = new LaptopBuilder();
            computerShop.ConstructComputer(computerBuilder);
            computerBuilder.Computer.DisplayConfiguration();

            computerBuilder = new DesktopBuilder();
            computerShop.ConstructComputer(computerBuilder);
            computerBuilder.Computer.DisplayConfiguration();

            computerBuilder = new AppleBuilder();
            computerShop.ConstructComputer(computerBuilder);
            computerBuilder.Computer.DisplayConfiguration();
            Console.ReadKey();
        }