abstract  class Human

    {

        public abstract void Think();

        public abstract int Age { get; set; }

        public void ShowType(Human human) => Console.WriteLine($"这个{human.GetType().FullName}");

    }

    class Iam : Human

    {

        public override int Age { get ; set ; }

        public override void Think() => Console.WriteLine("这个实现的父抽象类的方法");

    }

    class Program

    {

        static void Main(string[] args)

        {

            var iam = new Iam();

            iam.ShowType(iam);

            Console.ReadKey();

        }