static void Main(string[] args)
{
Composite root = new Composite("root");
root.AddComp(new Leaf("LeafA"));
root.AddComp(new Leaf("LeafB"));
Composite comp = new Composite("Composite X");
comp.AddComp(new Leaf("LeafXA"));
comp.AddComp(new Leaf("LeafXB"));
root.AddComp(comp);
root.AddComp(new Leaf("LeafC"));
Leaf leaf = new Leaf("LeafD");
root.AddComp(leaf);
root.DisplayComp(1);
}