public void AddPreciseDaysTest(DateTime date, double day)
{
DateTime date1 = date.AddPreciseDays(day);
DateTime date2 = date.AddDays(day);
Assert.AreNotEqual(0, date1.Ticks % 10000);
Assert.AreEqual(0, date2.Ticks % 10000);
Assert.IsTrue(Math.Abs(date1.Ticks / 10000 - date2.Ticks / 10000) <= 1);
}