Format Decimal Places

public static void generatoRandomDouble()
{
  Random random = new Random();
  double r = random.NextDouble() * 100;
  // cut of all but 2 decimal places
  Console.WriteLine(r.ToString("#0.00"));
  // round the doube
  r= Math.Round(r, 2);
  Console.WriteLine(r);
  // use point "." as decimal point
  Console.WriteLine(r.ToString(CultureInfo.InvariantCulture.NumberFormat));
}