using System;

using System.Collections.Generic;

namespace CompositeNew

{

    public interface IComponent

    {

        void DisplayPrice();

    }

    public class Leaf : IComponent

    {

        public int Price { get; set; }

        public string Name { get; set; }

        public Leaf(string name, int price)

        {

​

            this.Price = price;

            this.Name = name;

        }

        public void DisplayPrice()

​

​

        {

            Console.WriteLine(Name + ": " + Price);

        }

    }

    public class Composite : IComponent

    {

        public string Name { get; set; }

        List<IComponent> components = new List<IComponent>();

        public Composite(string name)

        {

            this.Name = name;

​

        }

        public void AddComponent(IComponent component)

        {

            components.Add(component);

        }

​

        public void DisplayPrice()

        {

            Console.WriteLine(Name);

            foreach (var item in components)

            {

​

​

                item.DisplayPrice();

            }

        }

    }

​

    public class Program

    {

        public static void Main(string[] args)

        {

            //Creating Leaf Objects

            IComponent hardDisk = new Leaf("Hard Disk", 100);

            IComponent cpu = new Leaf("CPU", 140);

            IComponent ram = new Leaf("RAM", 80);

            IComponent mouse = new Leaf("Mouse", 10);

            IComponent keyboard = new Leaf("Keyboard", 30);

​

            //Creating composite objects

            Composite computer = new Composite("Computer");

            Composite cabinet = new Composite("Cabinet has: ");

            Composite motherBoard = new Composite("Mother board has:");

            Composite peripherals = new Composite("Peripherals");

​

            //Creating tree structure

            cabinet.AddComponent(hardDisk);

            cabinet.AddComponent(motherBoard);

            motherBoard.AddComponent(cpu);

            motherBoard.AddComponent(ram);

​

            //Ading mouse and keyborad in peripherals

            peripherals.AddComponent(mouse);

            peripherals.AddComponent(keyboard);

            //Ading cabinet and peripherals in computer

​

            computer.DisplayPrice();

            cabinet.DisplayPrice();

            Console.WriteLine();

​

            computer.DisplayPrice();

            peripherals.DisplayPrice();

            Console.WriteLine();

        }

    }

}

​

​