public static StopWatch fillStopWatch(StopWatch stopWatch)
        {
            ConsoleKeyInfo input;
            long           min, max;

            do
            {
                Console.Write("Press Enter to start -> ");
                input = Console.ReadKey();
                min   = DateTime.Now.Ticks;
                Console.Write("min = " + min.ToString() + "\n");

                Console.Write("Press Enter to finish ->");
                input = Console.ReadKey();
                max   = DateTime.Now.Ticks;
                Console.Write("max = " + max.ToString() + "\n");

                TimeInterval currentTimeInterval = new TimeInterval(min, max);
                stopWatch.insertTimeInterval(currentTimeInterval.getTimeInterval());
            } while (input.Key.ToString() != "Q");

            return(stopWatch);
        }