// Fridge
 public RedirectResult ToogleColdstoreDoor(int id = 0)
 {
     if (id != 0)
     {
         Device device = db.GetDeviceById(id);
         if (device != null && device is Fridge)
         {
             Fridge fridge = (Fridge)device;
             if (fridge.ColdstoreIsOpen)
             {
                 fridge.CloseColdstore();
             }
             else
             {
                 fridge.OpenColdstore();
             }
             db.UpdateDeviceById(id, device);
         }
     }
     return(Redirect("/Home/Index"));
 }