重写和多态

重写

子类对父类的方法进行重写时，父类的方法需要标注上virtual，子类的方法标注上override
属性也是可以被重写的

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Rewrite
{
    class person
    {
        public int _speed;
        public virtual int Speed
        {
            get { return _speed; }
            set { _speed = value; }
        }

        public virtual void getShow()
        {
            Console.WriteLine("我是父类方法!");
        }
    }

    class child : person
    {
        public override int Speed
        {
            get { return _speed; }
            set { _speed = value; }
        }
        public override void getShow()
        {
            Console.WriteLine("我是子类方法");
        }
    }
}
/* person person = new person();
 child child = new child();
 person.getShow();
 child.getShow();
 child.Speed = 100;
 Console.WriteLine(child.Speed);  100
 Console.ReadKey();*/

子类也可以调用父类的属性