内部班的公开和内部成员？ [英] Public and Internal members in an Internal class?

问题描述

好的，所以这可能是一个愚蠢的问题，肯定有一个明显的答案，但是我很好奇我是否错过了这里的任何细微之处。

Ok, so this may be a bit of a silly question, and there's certainly the obvious answer, but I was curious if I've missed any subtleties here.

在内部类中声明的公共成员与<$$之间在可见性/可用性方面是否存在差异c $ c>内部成员在内部类中声明？

Is there any difference in terms of visibility/usability between a public member declared in an internal class and an internal member declared in an internal class?

ie

internal class Foo
{
    public void Bar()
    {
    }
}

和

internal class Foo
{
    internal void Bar()
    {
    }
}

如果您将该方法声明为 public 以及虚拟，然后在公共的派生类中覆盖它，使用此修饰符的原因很明显。但是，这是唯一的情况吗……我还缺少其他东西吗？

If you declared the method as public and also virtual, and then overrode it in a derived class that is public, the reason for using this modifier is clear. However, is this the only situation... am I missing something else?

推荐答案

考虑这种情况：

public interface IBar { void Bar(); }
internal class C : IBar
{
    public void Bar() { }
}

此处C.Bar不能标记为内部；这样做是一个错误，因为D.GetBar（）的调用者可以访问C.Bar：

Here C.Bar cannot be marked as internal; doing so is an error because C.Bar can be accessed by a caller of D.GetBar():

public class D
{
    public static IBar GetBar() { return new C(); } 
}

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