特性(Attribute、AOP)

一、特性实例

        [Obsolete("Don't use Old method, use New method", false)]
        static void Old()
        {
            Console.WriteLine("This is Old!");
        }

        static void New()
        {
            Console.WriteLine("This is New!");
        }
        public static void Main(string[] args)
        {
            Old();
        }

    结果：