public int Add(AutoEntity auto)
        {
            try
            {
                using (var db = new CroceRossaEntities())
                {
                    db.Car.Add(auto.toCar());
                    db.SaveChanges();

                    return(0);
                }
            }
            catch (Exception)
            {
                return(-1);
            }
        }
        public int Update(AutoEntity auto)
        {
            try
            {
                using (var db = new CroceRossaEntities())
                {
                    Car Car = db.Car.First(x => x.CarOwnId == auto.Id);
                    if (Car != null)
                    {
                        Car = auto.toCar(Car);
                        db.SaveChanges();
                    }
                }

                return(0);
            }
            catch (Exception)
            {
                return(-1);
            }
        }