public void Test_DictionaryExtension_Import()
        {
            _Dic2.Add("a", 1);
            _Dic2.Add("b", 2);
            _Dic2.Add("c", 3);
            _Dic2.Add("d", 4);

            Dictionary<string, int> nv = new Dictionary<string, int>();
            nv.Import(_Dic2);
            nv.ShouldBeExtaclyTheSame(_Dic2);

        }