C# 中的默认访问修饰符

发布于 2024-09-18 00:09:05 字数 98 浏览 5 评论 0原文

如果我将创建一个如下所示的新对象，默认情况下它将具有哪个访问修饰符？

Object objectA = new Object();

原文

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

Object objectA = new Object();

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冷情妓 2024-09-25 00:09:06

任何成员都将始终拥有最严格的可用成员 - 因此在这种情况下，objectA 的可访问性是private。（假设它是一个实例变量。它作为局部变量没有任何意义，因为它们没有任何访问规则。）

因此：

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

相当于：

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

“默认为大多数私有”意味着对于类型来说，可访问性取决于上下文。这：

class Outer
{
    class Nested
    {
    }
}

相当于：

internal class Outer
{
    private class Nested
    {
    }
}

... 因为你不能有一个私有的非嵌套类。

只有一个地方添加显式访问修饰符可以使某些内容比没有时更加私有，那就是在属性声明中：

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

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

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.)

So this:

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

is equivalent to this:

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

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

class Outer
{
    class Nested
    {
    }
}

is equivalent to this:

internal class Outer
{
    private class Nested
    {
    }
}

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

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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梦中的蝴蝶 2024-09-25 00:09:06

void Foo()
{
    // private in method scope
    Object objectA = new Object();
}

class Bar()
{
    // private in class scrope
    Object objectA = new Object();
}

void Foo()
{
    // private in method scope
    Object objectA = new Object();
}

class Bar()
{
    // private in class scrope
    Object objectA = new Object();
}

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