查看会员资料
用 户 名：rapo****
发送消息- Email：用户隐藏
- Icq/MSN：
- 电话号码：
- Homepage：
- 会员简介：
最新会员发布资源
Symbol
- In C#, sometimes you would like to define a base class, or a library, that uses an enumeration, and you would like to allow derived classes or users of your library to define new values for it. Trouble is, enums are not extensible: a derived class or