/// <summary> /// The entry point of the program, where the program control starts and ends. /// </summary> /// <param name="args">The command-line arguments.</param> public static void Main(string[] args) { // Create a simple tree structure Composite root = new Composite(); root.AddChild(new Leaf()); root.AddChild(new Leaf()); Composite composite = new Composite(); composite.AddChild(new Leaf()); composite.AddChild(new Leaf()); root.AddChild(composite); // perform operation on entire tree root.DoThis(); }