public void CombineStringsToDateTimeTest()
{
Assert.IsNull(StringConversion.CombineStringsToDateTime("20161224", null, "17:24", "", ":", false));
Assert.AreEqual(new DateTime(2016, 12, 24, 17, 24, 00, 0),
StringConversion.CombineStringsToDateTime("20161224", "yyyyMMdd", "17:24", "", ":", false));
Assert.AreEqual(DateTime.FromOADate(.220),
StringConversion.CombineStringsToDateTime(".220", "yyyyMMdd", "", "", ":", true));
Assert.AreEqual(DateTime.FromOADate(0).Add(new TimeSpan(17, 24, 00)),
StringConversion.CombineStringsToDateTime("", "yyyyMMdd", "17:24", "", ":", true));
}