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

namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            BaseClass bc1 = new SubClass1();
            BaseClass bc2 = new SubClass2();
            SubClass1 sc1 = new SubClass1();
            SubClass2 sc2 = new SubClass2();

            bc1.Prinf();
            bc2.Prinf();
           
            sc1.Prinf();
            sc2.Prinf();
        }

        abstract public class BaseClass
        {
            public int i = 0;
            public virtual void Prinf()
            {
                Console.WriteLine("虚方法");
                Console.WriteLine("i=" + i);
            }
        }

        class SubClass1 : BaseClass
        {
            public int j = 1;
            public override void Prinf()
            {
                Console.WriteLine("重写方法");
                Console.WriteLine("j=" + j);
            }
        }

        class SubClass2 : BaseClass
        {
            public int k = 2;
            public new void Prinf()
            {
                Console.WriteLine("新方法");
                Console.WriteLine("k=" + k);
            }
        }
    }
}