////   This file contains the C# code from Program 11.1 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/pgm11_01.txt//public interface PriorityQueue : Container{    void Enqueue(ComparableObject obj);    ComparableObject Min { get; }    ComparableObject DequeueMin();}