public void Can_Combine_Date_And_Time_Parts() { var prevDate = new PersianDate(1380, 1, 1, 5, 22, 30); var today = new PersianDate(1388, 4, 25); var combined = today.Combine(prevDate); Assert.That(combined.Year, Is.EqualTo(1388)); Assert.That(combined.Month, Is.EqualTo(4)); Assert.That(combined.Day, Is.EqualTo(25)); Assert.That(combined.Hour, Is.EqualTo(5)); Assert.That(combined.Minute, Is.EqualTo(22)); Assert.That(combined.Second, Is.EqualTo(30)); }