نموذج التصميم المجمع

using System;
using System.Collections;

//the single interface for primitives & composite types.|

interface Component
{
      void AddChild(Component c);
      void Traverse();
}

//A primitive type.

 class Leaf : Component
{
    private int value = 0;
    public Leaf(int val)
    {
        value = val;
    }
    public void AddChild(Component c)
    {
        //no action; This method is not necessary for Leaf
    }
    public void Traverse()
    {
        Console.WriteLine("Leaf:" + value);
    }
}

//A composite type.

class Composite : Component
{
    private int value = 0;
    private ArrayList ComponentList = new ArrayList();

    public Composite(int val)
    {
        value = val;
    }

    public void AddChild(Component c)
    {
        ComponentList.Add(c);
    }

    public void Traverse()
    {
        Console.WriteLine("Composite:" + value);

        foreach (Component c in ComponentList)
        {
            c.Traverse();
        }
    }
}

class MyMain
{
    public static void Main()
    {
        //creating a TREE structure.
        Composite root = new Composite(100);     // Root
        Composite com1 = new Composite(200);   //Composite 1
        Leaf l1 = new Leaf(10);//Leaf1
        Leaf l2 = new Leaf(20);//Leaf2
        //Add two leafs to composite1
        com1.AddChild(l1);
        com1.AddChild(l2);
        Leaf l3 = new Leaf(30);//Leaf3

        root.AddChild(com1);//Add composite1 to root

        root.AddChild(l3);//Add Leaf3 directly to root
        root.Traverse();//Single method for both types.
    }
}