public static IEnumerable<DateTime> GetAllDaysBetween(DateTime from, DateTime to)
        {
            yield return from;

            while (from < to)
            {
                from = from.GetTomorrow();
                yield return from;

            }
        }
        public void GetNextDay()
        {
            DateTime testDate = new DateTime(2014, 2, 8);

            var result = testDate.GetTomorrow();

            Assert.AreEqual(new DateTime(2014, 2, 9), result);
        }