菜鸟C#成长记——嵌套类
我们都知道,类是有成员的,而类的成员是另一个用户定义的类型也是完全有可能。偶尔的,被包含的类可以为其外层类的服务而存在,因为它不必要向外界暴露。其实,嵌套类就是一个辅助类。这就是嵌套类。
嵌套类的好处是可以对外层类的所有成员进行访问。嵌套类的方法可以访问外层类的私有成员。这里要说明一点:公共的嵌套类可以在外层类的作用域内访问。
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FractionArtist只有一个成员:Draw()方法。它可以自由地访问Fraction的私有成员f .numerator和f.denominator,我们可以将这种情况理解问题成员的作用域!如果不是嵌套类,其他类要访问根本不可能。