public void TestGetHashCode()
{
Duration duration1 = new Duration(1, 0.0);
Duration duration2 = new Duration(1, 1.0);
Duration duration3 = new Duration(1, 0.0);
Assert.AreNotEqual(duration1.GetHashCode(), duration2.GetHashCode());
Assert.AreEqual(duration1.GetHashCode(), duration3.GetHashCode());
}