public void DateUtils_AddDaysToCurrentDate1()
        {
            int?     days   = 1;
            long     start  = DateTime.Now.Ticks;
            DateTime?result = DateUtils.AddDaysToCurrentDate(days);

            Assert.IsNotNull(result);
            long diff = ((DateTime)result).Ticks - start;

            Assert.AreEqual(true, (diff - TimeSpan.TicksPerDay) >= 0);
            DateTime test1 = new DateTime(diff - A_DAY_IN_MS);
            DateTime test2 = new DateTime(A_DAY_IN_MS);

            Assert.AreEqual(true, (diff - A_DAY_IN_MS) < A_DAY_IN_MS);
        }