Stopwatch time = new Stopwatch();

byte[] target = new byte[size];
for (int j = 0; j < size; j++)
target[j] = unchecked((byte)j); //Otherwise parts of the array are optimised out.

CCMD5Core.GetHash(target);

time.Start();
for (int i = 1; i <= iterations; i++)
{
target[0] = unchecked((byte)i);
CCMD5Core.GetHash(target);
}
time.Stop();

TimeSpan ts = time.Elapsed;

// Format and display the TimeSpan value.
string elapsedTime = String.Format(CultureInfo.CurrentCulture, "Total time for core iterations: \t{0:00}:{1:00}:{2:00}.{3:00}",
ts.Hours, ts.Minutes, ts.Seconds,
ts.Milliseconds / 10);
Console.WriteLine(elapsedTime, "RunTime");