public ActionResult Index() { string[] coursesNames = _coursesService.GetAllCourses(); Course[] aggregatedCourses = _coursesService.GetAggregatedCourses(); string[] teachers = _teachersService.GetAllTeachers(); Teacher[] aggregatedTeachers = _teachersService.GetAggregatedTeachers(); var model = new BoardModel { Courses = coursesNames, AggregatedCourses = aggregatedCourses, Teachers = teachers, AggregatedTeachers = aggregatedTeachers }; return(View(model)); }