C#图解教程（第四版）Chapter7-7.6使用基类的引用

using System;

namespace Chapter76UseRef_of_BaseClass
{
    class MyBaseClass
    {
        public void Print()
        {
            Console.WriteLine("This is the base class.");
        }
    }
    class MyDerivedClass : MyBaseClass
    {
        new public void Pirnt()
        {
            Console.WriteLine("This is the derived class.");
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            //Console.WriteLine("Hello World!");
            MyDerivedClass derived = new MyDerivedClass();
            MyBaseClass mybc=(MyBaseClass)derived;
            derived.Pirnt();
            mybc.Print();
        }
    }
}