public static CourseStudentEditModel CourseStudentEdit(string courseId)
        {
            CourseStudentEditModel model = new CourseStudentEditModel();

            model.CourseId = new Guid(courseId);
            return(model);
        }
        public static CourseStudent CourseStudentEditPost(CourseStudentEditModel model)
        {
            CourseStudent student = new CourseStudent();

            student.Id       = Guid.NewGuid();
            student.CourseId = model.CourseId;
            student.UserId   = model.StudentId;

            using (var context = new AttendanceTrackerDatabaseConnection())
            {
                context.CourseStudents.Add(student);
                context.SaveChanges();
            }

            return(student);
        }