using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading;

namespace ConsoleApplication1

{

    class House

    {

        protected int area;

        protected Door door;

        public House(int area)

        {

            this.area = area;

            door = new Door();

        }

        public int Area

        {

            get { return area; }

            set { area = value; }

        }

        public Door Door

        {

            get { return door; }

            set { door = value; }

        }

        public virtual void ShowData()

        {

            Console.WriteLine("I am a house, my area is {0} m2.", area);

​

        }

    }

    class Door

    {

        protected string color;

        public Door()

        {

            color = "brown";

        }

        public Door(string color)

        {

            this.color = color;

        }

        public string Color

        {

            get { return color; }

            set { color = value; }

        }

        public void ShowData()

        {

            Console.WriteLine("I have a door, it's color is {0}.", color);

        }

    }

    class SmallApartment : House

    {

        public SmallApartment()

            : base(50)

        {

        }

        public override void ShowData()

        {

            Console.WriteLine("I have an apartment, my area is " + area + "m2");

        }

    }

    class Person

    {

        protected string name;

        protected House house;

        public Person()

        {

            name = "Juan";

            house = new House(150);

        }

        public Person(string name, House house)

        {

            this.name = name;

            this.house = house;

        }

        public string Name

        {

            get { return name; }

            set { name = value; }

        }

        public House House

        {

            get { return house; }

            set { house = value; }

        }

        public void ShowData()

        {

            Console.WriteLine("My name is {0}.", name);

            house.ShowData();

            house.Door.ShowData();

        }

    }

    class TestHouse

    {

        static void Main()

        {

            bool debug = true;

            SmallApartment mySmallApartament = new SmallApartment();

            Person myPerson = new Person();

            myPerson.Name = "Juan";

            myPerson.House = mySmallApartament;

            myPerson.ShowData();

            if (debug)

                Console.ReadLine();

        }

    }

}

​

​