C＃ - 这可能标记被覆盖的方法，最终 [英] C# - is it possible to mark overriden method as final

问题描述

在C＃中，是否有可能重写的虚方法来标记为最终使实施者不能覆盖呢？我将如何做呢？

In C#, is it possible to mark an overridden virtual method as final so implementers cannot override it? How would I do it?

的实例可以更容易地理解：

An example may make it easier to understand:

class A
{
   abstract void DoAction();
}
class B : A
{
   override void DoAction()
   {
       // Implements action in a way that it doesn't make
       // sense for children to override, e.g. by setting private state
       // later operations depend on  
   }
}
class C: B
{
   // This would be a bug
   override void DoAction() { }
}

有没有办法从覆盖DoAction修改中的B以prevent其他孩子C，无论是在编译时或运行时？

Is there a way to modify B in order to prevent other children C from overriding DoAction, either at compile-time or runtime?

推荐答案

是的，密封：

class A
{
   abstract void DoAction();
}
class B : A
{
   sealed override void DoAction()
   {
       // Implements action in a way that it doesn't make
       // sense for children to override, e.g. by setting private state
       // later operations depend on  
   }
}
class C: B
{
   override void DoAction() { } // will not compile
}

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