c#写的电子邮件收发系统,利用.net平台提供的库函数实现的-write c # E-Mail System using. Net platform for the realization of the library functions

用c#做的一个简单的图书管理系统，access数据库，实现读者信息，图书信息的增查改删，图书借还期限与超期罚款等功能。数据库文件请放于E:\图书管理系统\WindowsApplication 即可运行-C# to do a simple library management system, access database, reader information, book information increased as a change deleted, book circulation pe