一个简单的基于.NET平台和XML数据源的同学录，本系统对XML增、删、改、查等操作都有，并有详细注释，超级管理员登陆账号和密码都是xml ！ -Based on a simple. NET platform and XML data sources of Classmates, the system of XML by adding, changing, checking and other operations are, and have detailed notes, the supe