public override void Request()
        {
            if (this.checkAccess())
            {
                realSubject = new RealSubject();
                realSubject.Request();

                this.logAccess();
            }
        }
        static void Main(string[] args)
        {
            Client client = new Client();

            Console.WriteLine("Client: Executing the client code with a real subject:");

            RealSubject realSubject = new RealSubject();

            client.ClientCode(realSubject);

            Console.WriteLine();

            Console.WriteLine("Client: Executing the same client code with a proxy:");

            Proxy proxy = new Proxy();

            client.ClientCode(proxy);
        }