public void AddPreciseSecondsTest(DateTime date, double seconds)
        {
            DateTime date1 = date.AddPreciseSeconds(seconds);
            DateTime date2 = date.AddSeconds(seconds);

            Assert.AreNotEqual(0, date1.Ticks % 10000);
            Assert.AreEqual(0, date2.Ticks % 10000);
            Assert.IsTrue(Math.Abs(date1.Ticks / 10000 - date2.Ticks / 10000) <= 1);
        }