public static string AddProductsSpec(int Speec_grpID, int PID, string Spec_title, string Spec_value) { try { PAWDStoreEntities context = new PAWDStoreEntities(); var status = context.Product_specification_insert(null, PID, Spec_title, Spec_value, DateTime.Now, null).SingleOrDefault(); return(JsonConvert.SerializeObject(status)); } catch (Exception ex) { throw ex.InnerException; } }