public List <Artist> List()
        {
            try
            {
                var bc = new ArtistBusiness();
                return(bc.List());
            }
            catch (Exception ex)
            {
                var httpError = new HttpResponseMessage()
                {
                    StatusCode = (HttpStatusCode)422,
                    Content    = new StringContent(ex.Message)
                };

                throw new HttpResponseException(httpError);
            }
        }