错误：set访问的可访问修饰符必须比属性或索引更严格 [英] ERROR: the accessibility modifier of the set accessor must be more restrictive than the property or indexer

问题描述

我有一个有点混乱与属性访问器。

i'm having a bit of confusion with property accessors.

我想有它的set访问内部属性只访问派生类。

I'd like to have an internal property with its set accessor only accessible to derived classes.

像这样

internal [internalClass] MyProperty
{
get {return _prop;}
protected set {_prop = value;}
}

当我这样做的编译器抱怨。

when i do this the compiler complains.

MSDN，讨论这个特定错误时，建议更改设置访问修饰符私人

MSDN, when discussing this particular error suggests changing the set access modifier to private

这是不是我想要这个去。

which is not where i want this to go.

它看起来像受保护的内部要使用这条修改一个不错的选择给出了同样的错误。

it looks like Protected Internal should be an option here however using this modifier gives the same error

我有一种感觉，我缺少访问修饰符的一些基本的了解。

I have a feeling i'm missing some basic understanding of access modifiers.

感谢

推荐答案

无论是保护也不受保护的内部更比内部限制性。双方将让派生类型从不同的装配访问setter方法而不是吸气。 受保护的内部给出了保护和内部访问的联盟的，不是的路口的。 （这里有代表在CLR路口的访问级别，但它不是由C＃曝光。）

Neither protected nor protected internal is more restrictive than internal. Both would let derived types from a different assembly access the setter but not the getter. protected internal gives access to the union of protected and internal, not the intersection. (There is an access level representing the intersection in the CLR, but it's not exposed by C#.)

您可能是最好还是使用私人setter和一个受保护的 SetMyProperty 方法，它只是调用私有制定者，如果符合你想要达到的目标。

You might be best off using a private setter and a protected SetMyProperty method which just calls the private setter, if that matches what you want to achieve.

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