.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 ComparerSamples
  {
    public static void Main() 
    {
      Comparer c = Comparer.Default;
      string a = "apples", o = "oranges";
      Console.WriteLine(
        "Comparing {0} to {1} returns {2}",
        a, o, c.Compare(a, o));
    }
  }
}

The output is

Comparing apples to oranges returns -1