public ActionResult Edit(Location location)
        {
            if(ModelState.IsValid)
            {
                _repo.Update(location);
                return RedirectToAction("Index");
            }

            return View(location);
        }
 public Location Update(Location location)
 {
     Db.Entry(location).State = EntityState.Modified;
     Db.SaveChanges();
     return location;
 }
 public Location Add(Location location)
 {
     Db.Locations.Add(location);
     Db.SaveChanges();
     return location;
 }