public string InsertVehicule(Vehicle vehicle, int sector, int placeNumber, DateTime startTime)
 {
     throw new NotImplementedException();
 }
        public int Delete(Vehicle id)
        {
            this.vehicles.Delete(id);

            return this.vehicles.SaveChanges();
        }
        public int Update(Vehicle vehicle)
        {
            this.vehicles.Update(vehicle);

            return this.vehicles.SaveChanges();
        }
        public int Add(Vehicle vehicles)
        {
            this.vehicles.Add(vehicles);

            return this.vehicles.SaveChanges();
        }