public ActionResult DetailCourse(string id) { try { Guid degID = Guid.Parse(id); var getDegreeProgram = r.Degree_Program.Where(s => s.ProgramID == degID).Select(s => s).FirstOrDefault(); var specificLevel = r.Levels.Where(s => s.LevelID == getDegreeProgram.LevelID).Select(s => s.Level_Name).FirstOrDefault(); IEnumerable <Degree_Subject> ds = CoursesModel.getSubjectsRelatedToDegree(degID); ViewBag.level = specificLevel; ViewBag.Degree = getDegreeProgram.Degree_ProgramName; return(View(ds)); } catch (Exception) { return(RedirectToAction("ManageCourses")); } }