public override void Remove(Component component)
 {
     Console.WriteLine("Leaf do not define Remove()");
 }
 public override void Add(Component component)
 {
     Console.WriteLine("Leaf do not define Add()");
 }
 public override void Remove(Component component)
 {
     this.lstComponent.Remove(component);
 }
 public override void Add(Component component)
 {
     this.lstComponent.Add(component);
 }
 public abstract void Remove(Component component);
 public abstract void Add(Component component);