SqlDataReader的
该类没有标记密封那么是什么使得它uninheritable?
SqlDataReader
class is not marked sealed then what makes it uninheritable?
在 SqlDataReader的
类的构造函数被标记为内部
这意味着它只能通过在 System.Data.dll中
组装类型的实例化。这也禁止你从它继承,作为基本类型不能被实例化。
The SqlDataReader
type's constructor is marked as internal
which means it can only be instantiated through types in the System.Data.dll
assembly. This also prohibits you from inheriting from it, as the base type cannot be instantiated.