C# 0 The Complete Reference

PART II

C h a p t e r   2 4 :  

C o l l e c t i o n s ,   E n u m e r a t o r s ,   a n d   I t e r a t o r s    

805

    Console.WriteLine("Inventory list after sorting:");

    foreach(Inventory i in inv) {

      Console.WriteLine("   " + i);

    }

  }

}

This program produces the same output as the previous, non-generic version.

IComparer'>Using an IComparer

Although implementing 

IComparable

 for classes that you create is often the easiest way to 

allow objects of those classes to be sorted, you can approach the problem in a different way 

by using 

IComparer

. To use 

IComparer

, first create a class that implements 

IComparer

, and 

then specify an object of that class when comparisons are required.

There are two versions of 

IComparer

: generic and non-generic. Although the way each 

is used is similar, there are some small differences, and each approach is examined here.