public void AddCar(Car car)
        {
            var context = new PeopleCarsDbContext(_connectionString);

            context.Cars.Add(car);
            context.SaveChanges();
        }
        public void AddPerson(Person person)
        {
            var context = new PeopleCarsDbContext(_connectionString);

            context.People.Add(person);
            context.SaveChanges();
        }