public void preamble_with_equal_lengths()
        {
            StringEqualExpect Expect = new StringEqualExpect(IgnoredBody, "Hello World", "Hello World");

            Check.That(() => Expect.Preamble == "String lengths are both 11.");
        }
        public void preamble_when_lengths_differ()
        {
            StringEqualExpect Expect = new StringEqualExpect(IgnoredBody, "Hello World", "Hello world!");

            Check.That(() => Expect.Preamble == "Expected string length 12 but was 11.");
        }