public virtual void TestDateTimeAddDate()
{
TimeSpan ts = new TimeSpan(2, 2, 2, 2);
var od = db.Orders.FirstOrDefault(o => o.OrderDate == new DateTime(1997, 8, 25) && o.OrderDate.Add(ts) == new DateTime(1997, 8, 27, 2, 2, 2));
Assert.AreNotEqual(null, od);
}