public void update(int id, Auther new_auther)
{
//var auther = find(id);
//auther.Name = new_auther.Name;
db.Update(new_auther);
db.SaveChanges();
}
public void update(int id, Book newbook)
{
//// var book = books.SingleOrDefault(b => b.Idbook == id); repeted in find method
//var book = find(id);
//book.Title = newbook.Title;
//book.Description = newbook.Description;
//book.Auther = newbook.Auther;
//book.imageurl = newbook.imageurl;
db.Update(newbook);
db.SaveChanges();
}