private HttpContent BuildContent()
        {
            if (_setupContext.Files().Any())
            {
                return(BuildMultipartContent());
            }
            if (_setupContext.Params().Any())
            {
                return(BuildFormContent());
            }
            if (!string.IsNullOrEmpty(_setupContext.Body()))
            {
                return(BuildStringContent());
            }

            return(null);
        }