////   This file contains the C# code from Program 7.18 of//   "Data Structures and Algorithms//    with Object-Oriented Design Patterns in C#"//   by Bruno R. Preiss.////   Copyright (c) 2001--2002 by Bruno R. Preiss, P.Eng.  All rights reserved.////   http://www.brpreiss.com/books/opus6/programs/pgm07_18.txt//public class OrderedListAsLinkedList :    AbstractSearchableContainer, OrderedList{    protected LinkedList linkedList;    protected class MyCursor : Cursor    {	private OrderedListAsLinkedList list;	LinkedList.Element element;	public void Withdraw()	{	    list.linkedList.Extract(element.Datum);	    --list.count;	}	// ...    }    // ...}