public List <Assignment> SetListAnalytic(List <Assignment> assignments) { List <Course> courses = new CourseService().GetList(); List <Student> students = new StudentService().GetList(); new Enroll().SetEnrollment(courses, students); List <Trainer> trainers = new TrainerService().SetList(); new Courses_Trainers().SetCrs_Tr(courses, trainers); new Course_Assignment().GetCourse_Assignment(courses, assignments); return(assignments); }