public void add(Book entity)
{
//entity.Idbook = books.Max(b => b.Idbook) + 1;// to add new book add automatically id
//books.Add(entity);
db.books.Add(entity);
db.SaveChanges();
}
public void add(Auther entity)
{
//entity.Id_auther = Authers.Max(b => b.Id_auther) + 1;
//Authers.Add(entity);
db.authers.Add(entity);
db.SaveChanges();
}