摘要:
有如下四个类。 public class Animal { } public class Mammal : Animal { } public class Dog : Mammal { public void EatBone() { } } public class Panda : Mammal { public void EatBamboo() { } } Animal animal = new Dog();这样的赋值肯定是没问题的... 阅读全文
posted @ 2013-06-28 16:20
Joe Cheung
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