C# 抽象类

namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
           Football footBall =new Football();
           BasketBall basketBall=new BasketBall();
           //调用PlayBall方法
           PlayBall(footBall);
           PlayBall(basketBall);
            Console.ReadKey();
        }

        static void PlayBall(Ball ball)
        {
            Console.WriteLine("球类：{0}",ball.Ballname);
            ball.Play();
        }
    }

    public abstract class Ball
    {
        /// <summary>
        /// 球的名字
        /// </summary>
        public abstract string Ballname { get; }

        /// <summary>
        /// 打球
        /// </summary>
        public abstract void Play();
    }

    public class Football :Ball
    {
        public override string Ballname
        {
            get { return "足球"; }
        }

        public override void Play()
        {
            Console.WriteLine("正在踢足球...");
        }
    }
    public class BasketBall : Ball
    {
        public override string Ballname
        {
            get { return "篮球"; }
        }

        public override void Play()
        {
            Console.WriteLine("正在打篮球...");
        }
    }
}