ssukhpinder

public class Sukhpinder : ICelebrityInstagram
{
    private readonly List<IFollower> _posts = new List<IFollower>();
    private string _post;
    public string FullName => "Sukhpinder Singh";

    public string Post {
        get { return _post; }
        set
        {

ssukhpinder

public class Follower : IFollower
{
    public void Update(ICelebrityInstagram celebrityInstagram)
    {
        Console.WriteLine($"Follower notified. Post of {celebrityInstagram.FullName}: " +
            $"{celebrityInstagram.Post}");
    }
}

ssukhpinder

static void Main(string[] args)
{
    IVehicleAggregate car = new Vehicles.Car();
    IVehicleAggregate motercycle = new Vehicles.Motercycle();

    IVehicleIterator carIterator = car.CreateIterator();
    IVehicleIterator motercycleIterator = motercycle.CreateIterator();

    PrintVehicles(carIterator);
    PrintVehicles(motercycleIterator);

ssukhpinder

public class Motercycle : IVehicleAggregate
{

    private string[] _motercycles;
    public Motercycle()
    {
        _motercycles = new[] { "Bike 1", "Bike 2", "Bike 3" };
    }
    public IVehicleIterator CreateIterator()
    {

ssukhpinder

public class Car : IVehicleAggregate
{
    private List<string> _cars;
    public Car()
    {
        _cars = new List<string> { "Car 1", "Car 2", "Car 3" };
    }

    public IVehicleIterator CreateIterator()
    {

ssukhpinder

public class MotercycleIterator : IVehicleIterator
{
    private string[] _motercylces;
    private int _current;
    public MotercycleIterator(string[] motercylces)
    {
        _motercylces = motercylces;
        _current = 0;
    }
    public string Current()

ssukhpinder

public class CarIterator : IVehicleIterator
{
    private List<string> _cars;
    private int _current;
    public CarIterator(List<string> cars)
    {
        _cars = cars;
        _current = 0;
    }
    public string Current()

ssukhpinder

static void Main(string[] args)
{
    Car car = new SmallCar();
    Console.WriteLine($"Price of car {car.GetName()} : " + car.CarPrice());

    var car1 = new Sunroof(car);
    Console.WriteLine($"Price of car {car1.GetName()} : " + car1.CarPrice());

    var car2 = new AdvanceMusic(car);
    Console.WriteLine($"Price of car {car2.GetName()} : " + car2.CarPrice());

ssukhpinder

public class Sunroof : CarDecorator
{
    public Sunroof(Car car) : base(car)
    {
    }

    public override int CarPrice() => _car.CarPrice() + 2000;
    public override string GetName() => "Alto Lxi with Sunroof";
}

ssukhpinder

public class AdvanceMusic : CarDecorator
{
    public AdvanceMusic(Car car) : base(car)
    {
    }

    public override int CarPrice() => _car.CarPrice() + 3000;
    public override string GetName()=> "Alto Lxi with advance music system";
}