////   This file contains the C# code from Program 15.9 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/pgm15_09.txt//public class MedianOfThreeQuickSorter : AbstractQuickSorter{    protected override int SelectPivot(int left, int right)    {	int middle = (left + right) / 2;	if (array[left] > array[middle])	    Swap(left, middle);	if (array[left] > array[right])	    Swap(left, right);	if (array[middle] > array[right])	    Swap(middle, right);	return middle;    }}