.NET Framework Standard Library Annotated Reference, Volume 1: Base Class Library and Extended Numerics Library

Example

using System;
using System.Collections;

namespace Samples
{
  public class ArraySample
  {
    public class MyReverseComparer: IComparer
    {
      public int Compare(Object a, Object b)
      {
        return -((IComparable)a).CompareTo(b);
      }
    }
    public static void Main()
    {
      string[] strings = {"one", "two", "three"};
      Console.WriteLine("Array elements: ");
      Display(strings);
      Array.Reverse(strings);
      Display(strings);
      Array.Sort(strings);
      Display(strings);
      Array.Sort(strings, new MyReverseComparer());
      Display(strings);
    }
    public static void Display(Array a)
    {
      foreach(object o in a)
        Console.Write("{0} ", o);
      Console.WriteLine();
    }
  }
}

The output is

Array elements:
one two three
three two one
one three two
two three one