public JsonResult GetCoursesTakebByStudent(int studentId) { IEnumerable <Course> courses = studentResultManager.GetCoursesTakenByaStudentById(studentId); return(Json(courses, JsonRequestBehavior.AllowGet)); //Course aStudentResult = studentResultManager.GetCoursesTakenByaStudentById(studentId).ToList().Find(st => st.Id == studentId); //IEnumerable<Course> courses = studentResultManager.GetCoursesTakenByaStudentById(studentId).ToList().FindAll(d =>d.Id == studentId ); //return Json(courses, JsonRequestBehavior.AllowGet); //StudentResult aStudentResult = studentResultManager.GetCoursesTakenByStudentId(studentId).ToList().Find(st => st.Id == studentId); //IEnumerable<StudentResult> courses = studentResultManager.GetCoursesTakenByStudentId(studentId).ToList().FindAll(d => d.CourseId == aStudentResult.CourseId); //return Json(courses, JsonRequestBehavior.AllowGet); }