public void WhenIsNull_ThenThrowException()
 {
     Assert.Throws <ArgumentNullException>(() => EnumerableStringExtensions.GetShortest(null));
 }
 public static void OrderNamespaces_GivenNullCollection_ThrowsArgumentNullException()
 {
     Assert.That(() => EnumerableStringExtensions.OrderNamespaces(null), Throws.ArgumentNullException);
 }