这是一个C#开发的手机管理系统，内含源代码和数据库文件，只要下载附加数据库就可以运行，还有PPT是一个很好的学习代码。-This is a C# Developed mobile phone management system, including source code and database files, as long as you can download the attached database to run, as well as PPT is a very good learn