//for udateing
        public string Update([FromBody] Shelvecs shelve)
        {
            var OurBook = contaxt1.Shelves.Where(z => z.Id == shelve.Id).FirstOrDefault();

            ///  var xxx = contaxt1.Shelves.Find(id);
            if (OurBook == null)
            {
                return("This is not exist ");
            }
            else
            {
                OurBook.Name   = shelve.Name;
                OurBook.Titele = shelve.Titele;
                OurBook.UserId = shelve.UserId;
                OurBook.Id     = shelve.Id;
                contaxt1.SaveChanges();
                return("Update is Okey ");
            }
        }
        ///for adding shele
        public string Add([FromBody] Shelvecs shelve)
        {
            Shelvecs shelve1 = new Shelvecs
            {
                Name   = shelve.Name,
                Titele = shelve.Titele,
                UserId = shelve.UserId,
                Id     = shelve.Id,
            };
            var res = contaxt1.Shelves.Any(c => c.Id == shelve1.Id);

            if (res)
            {
                return("this shelve is exist later ");
            }
            else
            {
                contaxt1.Shelves.Add(shelve1);
                contaxt1.SaveChanges();
                return("its Okey !!");
            }
        }