public void PalinPerm3()
            {
                var pal      = new PalindromePermutationClass();
                var expected = false;
                var actual   = pal.PalindromePermutation("qwerty");

                Assert.AreEqual(expected, actual);
            }
            public void PalinPerm4()
            {
                var pal      = new PalindromePermutationClass();
                var expected = false;
                var actual   = pal.PalindromePermutation("asdfghfdsa"); //there's a single 'g' and a single 'h', so this should be false

                Assert.AreEqual(expected, actual);
            }
            public void PalinPerm2()
            {
                var pal      = new PalindromePermutationClass();
                var expected = true;
                var actual   = pal.PalindromePermutation("aaaa");

                Assert.AreEqual(expected, actual);
            }