public ResponseModel <GroupModel> GetById(int id) { var resp = new ResponseModel <GroupModel>(); try { var app = AppRepo.GetGroupModelById(id); if (app != null) { resp.Data = app; resp.Status = 200; resp.Description = "OK"; } else { resp.Status = 200; resp.Data = null; resp.Description = "Group not found"; } } catch (Exception ex) { resp.Status = 500; resp.Description = $"Error: {ex.Message}"; resp.Data = null; } return(resp); }