C＃中的默认访问修饰符 [英] Default access modifier in C#

问题描述

如果我要创建一个如下所示的新对象，则默认情况下它将具有哪个访问修饰符？

If I will create a new object like the following, which access modifier will it have by default?

Object objectA = new Object();

推荐答案

任何成员将始终拥有限制性最强的一个-因此在这种情况下， objectA 的可访问性为 private 。 （假设它是一个实例变量。由于它们没有任何访问规则，因此作为局部变量没有意义。）

Any member will always have the most restrictive one available - so in this case the accessibility of objectA is private. (Assuming it's an instance variable. It makes no sense as a local variable, as they don't have any access rules as such.)

所以这：

class Foo
{
    Object objectA = new Object();
}

与此等效：

internal class Foo
{
    private Object objectA = new Object();
}

默认为大多数私有意味着对于类型，可访问性取决于上下文。

The "default to most private" means that for types, the accessibility depends on the context. This:

class Outer
{
    class Nested
    {
    }
}

与此等效：

internal class Outer
{
    private class Nested
    {
    }
}

...，因为您不能拥有私人的非嵌套类。

... because you can't have a private non-nested class.

只有一个 地方，添加显式访问修饰符可以使某些内容变得比没有该属性时更加私密，并且位于属性声明中：

There's only one place where adding an explicit access modifier can make something more private than it is without, and that's in property declarations:

public string Name { get; set; } // Both public

public string Name { get; private set; } // public get, private set

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