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

namespace ConsoleApp4
{
    public class GetTheName
    {
        public virtual string ReWrite_Get()   // 实现重写的虚方法
        {
            return "父类";
        } 

        public string Cover_Get()        // 实现覆盖实方法
        {
            return "父类";
        } 
    }

    public class Rewrite : GetTheName   // 继承父类的重写子类
    {
        public override string ReWrite_Get()
        {
            return "父类被改变"; 
        }
    }

    public class Cover : GetTheName  // 继承父类的覆盖子类
    {
        public new string Cover_Get() 
        { 
            return "父类被改变";
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            GetTheName getTheName = new GetTheName();  //  对父类实例化
            Console.WriteLine(getTheName.ReWrite_Get()); // 调用父类虚方法
            Console.WriteLine(getTheName.Cover_Get());  // 调用父类实方法

            GetTheName rewrite = new Rewrite(); // 用子类创建父类对象
            Console.WriteLine(rewrite.ReWrite_Get());

            GetTheName ovverides = new Cover(); // 用子类创建父类对象
            Console.WriteLine(ovverides.Cover_Get());
            Console.ReadKey();
        }
    }
}