private static void Main(string[] args)
{
#region 结构实现
// Create a tree structure
Structural.Composite root = new Structural.Composite("root");
root.Add(new Leaf("Leaf A"));
root.Add(new Leaf("Leaf B"));
Structural.Composite comp = new Structural.Composite("Composite X");
comp.Add(new Leaf("Leaf XA"));
comp.Add(new Leaf("Leaf XB"));
root.Add(comp);
root.Add(new Leaf("Leaf C"));
// Add and remove a leaf
Leaf leaf = new Leaf("Leaf D");
root.Add(leaf);
root.Remove(leaf);
// Recursively display tree
root.Display(1);
#endregion
Console.WriteLine("******************************");
#region 实践应用
Graphics graphics = new Graphics("全部图形");
Circle circle = new Circle("圆形", 5);
graphics.Add(circle);
Rectangle rectangle = new Rectangle("矩形", 4, 5);
graphics.Add(rectangle);
Triangle triangle = new Triangle("三角形", 3, 4, 5);
graphics.Add(triangle);
graphics.Display();
#endregion
Console.ReadKey();
}