static void Main(string[] args)
{
var stopwatch = new StopWatch();
Console.WriteLine("Hello!");
do
{
Console.WriteLine("Type 'start' to start this stopwatch: ");
stopwatch.Start();
Console.WriteLine("Type 'stop' to stop this stopwatch: ");
stopwatch.Stop();
stopwatch.DurationTime(stopwatch.StartTime, stopwatch.StopTime);
} while (stopwatch.Command == "run");
}
