public HttpResponseMessage GetAvailableifrstbills(HttpRequestMessage request)
        {
            return(GetHttpResponse(request, () =>
            {
                IFRSTbills[] ifrstbill = _IFRSDataService.GetAllIFRSTbills().ToArray();

                return request.CreateResponse <IFRSTbills[]>(HttpStatusCode.OK, ifrstbill.ToArray());
            }));
        }