C#多层继承问题

using System;

namespace 多层继承问题
{
    class Program
    {
        static void Main(string[] args)
        {
            SuperSubDerivedClass superSubDerivedClass = new SuperSubDerivedClass();

            SubDerivedClass subDerivedClass = superSubDerivedClass;
            DerivedClass derivedClass = superSubDerivedClass;
            BaseClass baseClass = superSubDerivedClass;
            //输出：
            //SuperSubDerivedClass
            //SubDerivedClass
            //SubDerivedClass
            //BaseClass

            // 假设如下实例化：则各自调用各自。
            SubDerivedClass subDerivedClass = new SubDerivedClass();
            DerivedClass derivedClass = new DerivedClass();
            BaseClass baseClass = new BaseClass();
            // 输出：
            //SuperSubDerivedClass
            //SubDerivedClass
            //DerivedClass
            //BaseClass

            superSubDerivedClass.DisplayName();
            subDerivedClass.DisplayName();
            derivedClass.DisplayName();
            baseClass.DisplayName();
            Console.ReadLine();
            Console.WriteLine("Hello World!");
        }
    }

    class BaseClass
    {
        public void DisplayName()
        {
            Console.WriteLine("BaseClass");
        }
    }

    class DerivedClass : BaseClass
    {
        public virtual void DisplayName()
        {
            Console.WriteLine("DerivedClass");
        }
    }

    class SubDerivedClass : DerivedClass
    {
        public override void DisplayName()
        {
            //base.DisplayName();
            Console.WriteLine("SubDerivedClass");
        }
    }
    class SuperSubDerivedClass : SubDerivedClass
    { 
        public new void DisplayName()
        {
            Console.WriteLine("SuperSubDerivedClass");
        }
    }


}

对于DerivedClass.DisplayName()是虚方法，而SubDerivedClass.DisplayName()是重写了他的派生得最远的成员。

如果使用了New修饰符的SuperSubDerivedClass.DisplayName()将被隐藏。