// (c) 2007 Richard Grimes
// www.grimes.demon.co.uk

using System;
using System.Diagnostics; 

class App
{
   static void Main()
   {
      PerformanceCounterCategory[] cats = PerformanceCounterCategory.GetCategories();
      foreach (PerformanceCounterCategory cat in cats)
      {
         Console.WriteLine(cat.CategoryName);
         string[] instances = cat.GetInstanceNames();
         foreach (string instance in instances)
         {
            Console.WriteLine("\t" + instance);
         }
      }
   }
}