public void DateDiffPersianTest()
{
Assert.AreEqual("24", dateTimeHelper.DateDiffPersian("day", "۱۳۹۰/۱/۱۷", "۱۳۹۰/۲/۱۰"));
//Assert.AreEqual("0", dateTimeHelper.DateDiffPersian("month", "۱۳۹۰/۱/۱۷", "۱۳۹۰/۲/۱۰"));
//Assert.AreEqual("0", dateTimeHelper.DateDiffPersian("year", "۱۳۹۰/۱/۱۷", "۱۳۹۰/۲/۱۰"));
}