public void UpperCase()
            {
                var headers = new Dictionary<string, string>();
                headers["Content-Length"] = "3";

                Assert.AreEqual(3, headers.GetContentLength(), "Unexpected content length.");
            }
            public void None()
            {
                var headers = new Dictionary<string, string>();

                Assert.AreEqual(-1, headers.GetContentLength(), "Unexpected content length.");
            }