public void ValidatedBissextYear()
{
//Output 29/02/2016 17:00
datetime = DateTime.Parse("28/02/2016 17:00");
string microsoft_result = datetime.AddHours(24).ToString("dd/MM/yyyy HH:mm");
string new_datetime = my_datetime.AddHours("28/02/2016 17:00", 24);
string my_result = my_datetime.Format(new_datetime, 1);
Assert.AreEqual(microsoft_result, my_result);
}