public async Task <ActionResult <IEnumerable <BookMODEL> > > GetBook() { var resultProcess = await bookBLL.GetAllAsync(); if (!resultProcess.IsApproved) { return(BadRequest(resultProcess.ShortMessage)); } if (((List <BookMODEL>)resultProcess.ObjectResult).Count == 0) { return(NotFound()); } return((List <BookMODEL>)resultProcess.ObjectResult); }