这种装修设计模式怎么写

就像这样的

这种的设计模式，先写什么后写什么，
求大神帮我罗列书详细步骤图，我是个新手，
所以比较蒙，感谢各位大神了，或者有类似的代码也可以。
------------十分感谢你们的帮助

public abstract class Home
{
public string description = "空房子";
public abstract string getDescription();

    public Double Area;
    public abstract Double getArea();
}

//房子
public class House : Home
{
    public House()
    {
        description = "MyHouse:";
    }

    public override string getDescription()
    {
        return description;
    }

    public override Double getArea()
    {
        return 0.0;
    }
}

//主卧
public class MainCell : Home 
{
    Home home;

    public MainCell(Home home,Double area)
    {
        this.home = home;
        this.Area = area;
    }

    public override string getDescription()
    {
        return this.home.getDescription() + " MainCell";
    }

    public override Double getArea()
    {
        return this.Area + home.getArea(); 
    }
}

//阳台
public class Balcony : Home
{
    Home home;

    public Balcony(Home home, Double area)
    {
        this.home = home;
        this.Area = area;
    }

    public override string getDescription()
    {
        return this.home.getDescription() + " Balcony";
    }

    public override Double getArea()
    {
        return this.Area + home.getArea();
    }
}

采用装饰者模式，添加主卧装饰类，次卧装饰类，客厅装饰类，厨房装饰类，卫生间装饰类，阳台装饰类，根据需要进行装饰即可。

有没有人啊 这回答的具体一下子

----------------------biu~biu~biu~~~在下问答机器人小D，这是我依靠自己的聪明才智给出的答案，如果不正确，你来咬我啊！

 public abstract class Home
    {
        public string description = "空房子";
        public abstract string getDescription();

        public Double Area;
        public abstract Double getArea();
    }

    //房子
    public class House : Home
    {
        public House()
        {
            description = "MyHouse:";
        }

        public override string getDescription()
        {
            return description;
        }

        public override Double getArea()
        {
            return 0.0;
        }
    }

    //主卧
    public class MainCell : Home 
    {
        Home home;

        public MainCell(Home home,Double area)
        {
            this.home = home;
            this.Area = area;
        }

        public override string getDescription()
        {
            return this.home.getDescription() + " MainCell";
        }

        public override Double getArea()
        {
            return this.Area + home.getArea(); 
        }
    }

    //阳台
    public class Balcony : Home
    {
        Home home;

        public Balcony(Home home, Double area)
        {
            this.home = home;
            this.Area = area;
        }

        public override string getDescription()
        {
            return this.home.getDescription() + " Balcony";
        }

        public override Double getArea()
        {
            return this.Area + home.getArea();
        }
    }

//测试代码

//创建一个空房子，初期面积0
Home myHouse = new House();

//在房子上装饰一个主卧
myHouse = new MainCell(myHouse, 20);
//在房子上装饰一个主卧
myHouse = new MainCell(myHouse, 20);
//在房子上装饰一个阳台
myHouse = new Balcony(myHouse, 15);

Console.WriteLine(myHouse.getDescription());
Console.WriteLine("Area:" + myHouse.getArea());

//输入结果
MyHouse: MainCell MainCell Balcony
Area:55