public void HashCodeFalseOnDifferentValues()
        {
            MapEntry me = new MapEntry(1, "abc");
            PersistentVector v = PersistentVector.create(1, "abcd");

            Expect(me.GetHashCode(), Not.EqualTo(v.GetHashCode()));
        }
        public void HashCodeSameAsPersistentVector()
        {
            MapEntry me = new MapEntry(1, "abc");
            PersistentVector v = PersistentVector.create(1, "abc");

            Expect(me.GetHashCode(), EqualTo(v.GetHashCode()));
        }