public Response.P_INSERT_UPDATE_DAT_DET_OPERACION_FACTURA_Result Guardar_det_fac_opera(int id_factura, int id_operacion) { DB_GESDOCEntities _dataContext = base.Context.GetContext() as DB_GESDOCEntities; var result = (from r in _dataContext.P_INSERT_UPDATE_DAT_DET_OPERACION_FACTURA(0, id_operacion, id_factura) select new Response.P_INSERT_UPDATE_DAT_DET_OPERACION_FACTURA_Result() { id_det_ope_fact = r.ID_DET_OPE_FACT, id_operacion = r.ID_OPERACION, id_factura = r.ID_FACTURA }).ToList().First(); return(result); }