static void Main(string[] args)
        {
            Car car = new Car();
            HighwayPatrol highwayPolice = new HighwayPatrol();

            // Wiring the event handler of the listener to the event
            car.CarSpeedChanged += highwayPolice.HandleWhenExceedSpeed;

            car.Speed = 80; // Raise the event

            System.Console.ReadKey();
        }
        static void Main(string[] args)
        {
            Car           car           = new Car();
            HighwayPatrol highwayPolice = new HighwayPatrol();

            // Wiring the event handler of the listener to the event
            car.CarSpeedChanged += highwayPolice.HandleWhenExceedSpeed;

            car.Speed = 80; // Raise the event

            System.Console.ReadKey();
        }