public void CreateManyObjects()
        {
            var car1 = FlyweightFactory.Create(Color.Black, GetRandomSize());
            var car2 = FlyweightFactory.Create(Color.Gery, GetRandomSize());
            var car3 = FlyweightFactory.Create(Color.Green, GetRandomSize());
            var car4 = FlyweightFactory.Create(Color.Black, GetRandomSize());

            Assert.False(object.ReferenceEquals(car1, car2));
            Assert.False(object.ReferenceEquals(car1, car3));
            Assert.True(object.ReferenceEquals(car1, car4));
            Assert.False(object.ReferenceEquals(car2, car3));
            Assert.False(object.ReferenceEquals(car2, car4));
            Assert.False(object.ReferenceEquals(car3, car4));
        }