static void Main(string[] args)
{
Composite root = new Composite("root");
root.AddChild(new Leaf("Leaf 1-A"));
Composite composite = new Composite("Composite 1-B");
composite.AddChild(new Leaf("Leaf 2-A"));
composite.AddChild(new Leaf("Leaf 2-B"));
root.AddChild(composite);
root.AddChild(new Leaf("Leaf 1-C"));
root.doOperation();
Console.Read();
}