Program.cs

class Program
{
    static void Main(string[] args)
    {
        Profile("i++", () =>
                              {
                                  for (int i = 0; i < int.MaxValue; i++)
                                  {
                                      double foo = Math.Round(Math.Sqrt(3.4F) * 7823278.9F, 2);
                                  }
                              });

        Profile("++i", () =>
        {
            for (int i = 0; i < int.MaxValue; ++i)
            {
                double foo = Math.Round(Math.Sqrt(3.4F) * 7823278.9F, 2);
            }
        });

        Console.ReadKey();
    }

    static void Profile(string description, Action func)
    {
        // clean up
        GC.Collect();
        GC.WaitForPendingFinalizers();
        GC.Collect();

        // warm up 
        func();

        var watch = Stopwatch.StartNew();
        func();

        watch.Stop();
        Console.Write(description);
        Console.WriteLine(" Time Elapsed {0} ms", watch.ElapsedMilliseconds);
    }
}