enumerators

Enumerators can be used to read the data in the collection, but they cannot be used to modify the underlying collection.
枚举数可用于读取集合中的数据，但不能用于修改基础集合。
The enumerators determine the type to which they promote. And that type is machine-dependent.
其枚举成员决定了它们提升的类型，而所提升的类型依赖于机器。
We may supply an initial value for one or more enumerators. The value used to initialize an enumerator must be a constant expression .
可以为一个或多个枚举成员提供初始值，用来初始化枚举成员的值必须是一个常量表达式。
Enumerators allow read-only access to data in the collection and cannot be used to modify the underlying collection.
枚举数可对集合中的数据进行只读访问，但不能用于修改基础集合。
Enumerators only read data in the collection; they cannot be used to modify the underlying collection.
枚举数只读取集合中的数据，无法用于修改基础集合。
Enumerators cannot be used to modify the underlying collection.
Enumerators cannot be used to modify the underlying string.
Enumerators are the only exception.
The Foreach Loop includes a set of enumerators with properties that can be set by property expressions.
Foreach循环包括一组其属性可以由属性表达式设置的枚举器。
The custom extensions that can be developed include tasks, log providers, enumerators, connection managers, and data flow components.
可以开发的自定义扩展包括任务、日志提供程序、枚举器、连接管理器和数据流组件。