static void Main(string[] args)
{
BookCategory cat = new BookCategory();
Publisher publish1 = new Publisher { Nom = "Casterman" };
Author author1 = new Author { Name = "Rowling", FirstName = "Johannes" };
Book livre1 = new Book { Title = "C#", Lang = "FR-fr", NbPage = 450,Cat=BookCategory.SF };
livre1.addAuthor(author1, 0);
}
//----------------------------------------------------------------------------------
//----------------------------------------------------------------------------------
// METHODES
public void addAuthor(Author a,int i)
{
authors[i] = a;
}