public ActionResult Edit([Bind(Include = "Id,FirstName,LastName,GroupId")] Trainee trainee)
 {
     if (ModelState.IsValid)
     {
         db.Entry(trainee).State = EntityState.Modified;
         db.SaveChanges();
         return(RedirectToAction("Index"));
     }
     return(View(trainee));
 }
 public ActionResult Edit([Bind(Include = "Id,Name,Description")] Group group)
 {
     if (ModelState.IsValid)
     {
         db.Entry(group).State = EntityState.Modified;
         db.SaveChanges();
         return(RedirectToAction("Index"));
     }
     return(View(group));
 }