正在看Entity Framework有几个因为关于增删改查的

                //添加person表信息

                Person person = new Person();//人员信息表

                person.LastName = "2L";

                person.FirstName = "2F";

                ctx.AddToPerson(person);



                //添加-Course信息

                Course course = new Course();//课程表

                course.Title = "2111";

                ctx.AddToCourse(course);



                CourseInstructor courseconn = new CourseInstructor();关联表 两个字段(persionid、CourseID)

                courseconn.Person = person;

                courseconn.Course = course;

                ctx.AddToCourseInstructor(courseconn);



                

               

                ctx.SaveChanges();



                CourseInstructor conn = new CourseInstructor();

                conn.CourseInstructorID = 111;