string message );
CollectionAssert.IsNotSubsetOf( IEnumerable subset, IEnumerable superset,
          string message, params object[] args );

CollectionAssert.IsEmpty( IEnumerable collection );
CollectionAssert.IsEmpty( IEnumerable collection, string message );
CollectionAssert.IsEmpty( IEnumerable collection, string message,
          params object[] args );

CollectionAssert.IsNotEmpty( IEnumerable collection );
CollectionAssert.IsNotEmpty( IEnumerable collection, string message );
CollectionAssert.IsNot