class Program
    {
        static void Main(string[] args)
        {
            Dog dog = new Dog();
            Console.WriteLine("我能調用老祖宗Object的實例方法GetType,顯示結果為：" + dog.GetType() );
            Console.WriteLine("我能拿到父類的屬性Age=" + dog.Age);
            Console.WriteLine("我當然能拿到自己的公共字段_weight=" + dog._weight);
            
        }
    }
    public class Animal
    {
        public int Age { get; set; }
        public Animal(){}
    }
    public class Dog : Animal
    {
        public decimal _weight;
        public Dog(){}
    }