//
//   This file contains the C# code from Program 5.1 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/pgm05_01.txt
//
public abstract class ComparableObject : IComparable
{
    public abstract int CompareTo(Object obj);

    private int Compare(object obj)
    {
	if (GetType() == obj.GetType())
	    return CompareTo(obj);
	else
	    return GetType().FullName.CompareTo(
		obj.GetType().FullName);
    }

    public override bool Equals(object obj)
	{ return Compare(obj) == 0; }
    // ...
}