Random random = new Random((int)(DateTime.Now.Ticks));             int i = 0;             while (i < 100)             {                 int hour = random.Next(2, 5);                 int minute = random.Next(0, 60);                 int second = random.Next(0, 60);                 string tempStr = string.Format("{0} {1}:{2}:{3}", DateTime.Now.ToString("yyyy-MM-dd"), hour, minute, second);                 DateTime rTime = Convert.ToDateTime(tempStr);                 Console.WriteLine(rTime.ToString());                 i++;             }             Console.ReadKey();