public ActionResult Create(Course course)
        {
            if (ModelState.IsValid)
            {
                db.Courses.Add(course);
                db.SaveChanges();
                return RedirectToAction("Index");
            }

            ViewBag.DepartmentID = new SelectList(db.Departments, "DepartmentID", "DepartmentID", course.DepartmentID);
            return View(course);
        }
 public ActionResult Edit(Course course)
 {
     if (ModelState.IsValid)
     {
         db.Entry(course).State = EntityState.Modified;
         db.SaveChanges();
         return RedirectToAction("Index");
     }
     ViewBag.DepartmentID = new SelectList(db.Departments, "DepartmentID", "DepartmentID", course.DepartmentID);
     return View(course);
 }