回顾一下引用类型：
值类型与引用类型
class 为引用类型
class MyBaseClass { public void Print() { Console.WriteLine("This is base class"); } } class MyDerivedClass:MyBaseClass { new public void Print() { Console.WriteLine("This is derived class."); } } class Program{ static void Main(string []argc){ MyDerivedClass derived = new MyDerivedClass(); //创建一个对象 MyBaseClass mybc = (MyBaseClass)derived; //转换为引用 derived.Print(); mybc.Print(); Console.ReadKey(); } }运行效果：
