运用数据库保存学生的信息，将数据库与vs2013连接起来，用vs实现学生信息的增添，删除，修改(Use the database to save the student's information, connect the database with the vs2013, and use VS to add, delete, and modify the students' information.)

interfaces is, within SOA (Service Oriented Architecture). In SOA (WCF), a service is exposed through interfaces to different clients. Typically, an interface is exposed to a group of clients which needs to use common functionalities.

wcf