C#名称空间中的枚举与类中的枚举有什么区别 [英] C# what difference enum in namespace than enum inside a class

问题描述

我对下面的枚举有疑问:

i have a question about enums that the codes are below:

namespace space
{
    public enum MyEnums
    {
        Enum1,Enum2,...
    }
}

namespace space
{
    public class MyClass
    {
        public enum MyEnums
        {
            Enum1,Enum2,...
        }
    }
}

有什么区别以及如何使用它们?

whats difference and how to use them?

推荐答案

从语法上讲，唯一的区别是您可以将枚举类型作为包含类的开头:

Well syntactically the only difference is that you'd preface the enum type with the containing class:

MyClass.MyEnums.Enum1 

相对于

MyEnums.Enum1 

(在两种情况下，都假定名称空间被using指令覆盖)

(in both cases the namespace is assumed to be covered with a using directive)

但是，将其包含在类中还可以使您以不同的方式应用可访问性-您可以拥有仅在该类中可用的private枚举，而命名空间中的枚举必须为public或internal.

However, containing it within the class also lets you apply accessibility differently - you could have a private enum that is only usable within that class, while an enum within a namespace must be either public or internal.

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