强制接口的子类实现ToString [英] Force subclasses of an interface to implement ToString

问题描述

说我有一个接口IFoo，并且我希望IFoo的所有子类都覆盖Object的ToString方法.这可能吗?

Say I have an interface IFoo and I want all subclasses of IFoo to override Object's ToString method. Is this possible?

仅将方法签名添加到IFoo中是不起作用的:

Simply adding the method signature to IFoo as such doesn't work:

interface IFoo
{
    String ToString();
}

因为所有子类都扩展了Object并以这种方式提供了实现，所以编译器不会抱怨它.有什么建议吗?

since all the subclasses extend Object and provide an implementation that way, so the compiler doesn't complain about it. Any suggestions?

推荐答案

我不认为您可以使用界面来实现.但是，您可以使用抽象基类:

I don't believe you can do it with an interface. You can use an abstract base class though:

public abstract class Base
{
    public abstract override string ToString(); 
}

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