在C＃中密封方法

问题描述

我在C＃中的新手。我正在阅读有关密封keyword.I已经得到有关密封class.I读了有关密封方法行，我们可以使密封方法also.The线为（通过声明的方法作为密封，可避免这种方法的进一步压倒一切的。）
我已经创建了一个演示，但不明白上面的线和密封方法使用的意义。下面是我的代码： -

I am a newbie in C#.I am reading about Sealed keyword.I have got about sealed class.I have read a line about Sealed method where we can make Sealed method also.The line was (By declaring method as sealed, we can avoid further overriding of this method.) I have created a demo but didn't understand that the meaning of above line and sealed method use. Below is my code:-

using System;

namespace ConsoleApplication2
{
    class Program:MyClass
    {
        public override sealed void Test()
        {
            Console.WriteLine("My class Program");
        }
        static void Main(string[] args)
        {
            Program obj = new Program();
            obj.Test();
            Console.ReadLine();
        }
    }

    class MyClass
    {
        public virtual void Test()
        {
            Console.WriteLine("My class Test");
        }
    }


}

请告诉我，为什么我们使用密封的方法，什么是密封方法的优点。

Please tell me why we use Sealed methods and what are the advantages of Sealed methods.

推荐答案

那么，你与测试只有两个级别继承，而你没有得到到你，进一步压倒一切的方法点。如果你把它三，你可以看到密封所做的：

Well, you are testing with only two levels of inheritance, and you are not getting to the point that you're "further overriding" a method. If you make it three, you can see what sealed does:

class Base {
   public virtual void Test() { ... }
}
class Subclass1 : Base {
   public sealed override void Test() { ... }
}
class Subclass2 : Subclass1 {
   public override void Test() { ... } // FAILS!
   // If `Subclass1.Test` was not sealed, it would've compiled correctly.
}

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