public void it_should_serialize_the_headers_to_its_string_representation() { HeaderCollection headers = new HeaderCollection(); headers.Add(new Header("Header1", new[] { new HeaderValue("Value1", new HeaderParameter("Parameter1", "ParameterValue1")) })); headers.Add(new Header("Header2", new[] { new HeaderValue("Value2", new HeaderParameter("Parameter2", "ParameterValue2")) })); string expected = String.Format("{0}\r\n{1}\r\n\r\n", headers["Header1"], headers["Header2"]); headers.ToString().Should().Be(expected); }