public void TestFetchResponse()
        {
            var twilioRestClient = Substitute.For <ITwilioRestClient>();

            twilioRestClient.AccountSid.Returns("ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX");
            twilioRestClient.Request(Arg.Any <Request>())
            .Returns(new Response(
                         System.Net.HttpStatusCode.OK,
                         "{\"account_sid\": \"ACaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\",\"content_type\": \"application/pdf\",\"date_created\": \"2015-07-30T20:00:00Z\",\"date_updated\": \"2015-07-30T20:00:00Z\",\"fax_sid\": \"FXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\",\"sid\": \"MEaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\",\"url\": \"https://fax.twilio.com/v1/Faxes/FXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/Media/MEaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\"}"
                         ));

            var response = FaxMediaResource.Fetch("FXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX", "MEXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX", client: twilioRestClient);

            Assert.NotNull(response);
        }
    static void Main(string[] args)
    {
        // Find your Account Sid and Token at twilio.com/console
        const string accountSid = "ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
        const string authToken  = "your_auth_token";

        TwilioClient.Init(accountSid, authToken);

        var faxMedia = FaxMediaResource.Fetch(
            pathFaxSid: "FXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX",
            pathSid: "MEXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
            );

        Console.WriteLine(faxMedia.Sid);
    }
        public void TestFetchRequest()
        {
            var twilioRestClient = Substitute.For <ITwilioRestClient>();
            var request          = new Request(
                HttpMethod.Get,
                Twilio.Rest.Domain.Fax,
                "/v1/Faxes/FXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/Media/MEXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX",
                ""
                );

            twilioRestClient.Request(request).Throws(new ApiException("Server Error, no content"));

            try
            {
                FaxMediaResource.Fetch("FXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX", "MEXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX", client: twilioRestClient);
                Assert.Fail("Expected TwilioException to be thrown for 500");
            }
            catch (ApiException) {}
            twilioRestClient.Received().Request(request);
        }