static void Main(string[] args)
{
ISample sample1 = new Sample1();
sample1.SayHello("小明");
ISample sample2 = new Sample2();
sample2.SayHello("Mike");
ISample sample3 = new Sample3();
sample3.SayHello("山本桑");
Console.WriteLine("==== new 关键字 测试 ===");
AbstractSample sample3a = new Sample3();
sample3a.SayHello("山本桑");
sample3a.SayEnd();
Sample3 sample3b = new Sample3();
sample3b.SayHello("山本桑");
sample3b.SayEnd();
Console.WriteLine("==== override 与 new 的区别 ===");
Console.WriteLine("卡=普通卡！");
Card card1 = new NormalCard();
card1.LineUp();
card1.TakeMoney();
Console.WriteLine("卡=金卡！");
Card card2 = new GoldCard();
card2.LineUp();
card2.TakeMoney();
Console.WriteLine("金卡=金卡！");
GoldCard card3 = new GoldCard();
card3.LineUp();
card3.TakeMoney();
Console.ReadLine();
}