PerformanceCounterCategory.GetCategories Method

public static void Main(string[] args)
{
    string machineName = "";
    PerformanceCounterCategory[] categories;

    // Copy the machine name argument into the local variable.
    try
    {
        machineName = args[0]=="."? "": args[0];
    }
    catch
    {
    }

    // Generate a list of categories registered on the specified computer.
    try
    {
        if (machineName.Length > 0)
        {
            categories = PerformanceCounterCategory.GetCategories(machineName);
        }
        else
        {
            categories = PerformanceCounterCategory.GetCategories();
        }
    }
    catch(Exception ex)
    {
        Console.WriteLine("Unable to get categories on " + 
            (machineName.Length > 0 ? "computer \"{0}\":": "this computer:"), machineName);
        Console.WriteLine(ex.Message);
        return;
    }

    Console.WriteLine("These categories are registered on " + 
        (machineName.Length > 0 ? "computer \"{0}\":": "this computer:"), machineName);

    // Create and sort an array of category names.
    string[] categoryNames = new string[categories.Length];
    int objX;
    for(objX = 0; objX < categories.Length; objX++)
    {
        categoryNames[objX] = categories[objX].CategoryName;
    }
    Array.Sort(categoryNames);

    for(objX = 0; objX < categories.Length; objX++)
    {
        Console.WriteLine("{0,4} - {1}", objX + 1, categoryNames[objX]);
    }
}