抽象函数与虚函数

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

namespace 抽象函数与虚函数的实例
{
    abstract class A
    {
        public virtual void Fun1()
        {
            Console.WriteLine("我是A的虚函数！\n");
        }
        public abstract void Fun2();
    }
    class B : A
    {
        public override void Fun1()
        {
            Console.WriteLine("我是B的虚函数！\n");
        }
        public override void Fun2()
        {
            Console.WriteLine("我是B的抽象函数！\n");
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            B b = new B();
            b.Fun1();
            b.Fun2();
            Console.Read();
        }
    }
}