public void TwoKeyDictionaryTestSetUp()
        {
            string[] keys = { "a", "b", "c"};

            _dictionary = new SealedSymmetricTwoKeyDictionary<string, int>(keys);

            _dictionary["a", "a"] = 1;
            _dictionary["a", "b"] = 2;
            _dictionary["a", "c"] = 3;
            _dictionary["b", "b"] = 4;
            _dictionary["b", "c"] = 5;
            _dictionary["c", "c"] = 6;
        }
 public void TwoKeyDictionaryTestTearDown()
 {
     _dictionary = null;
 }