public ENLinePublishingOrder(int idLines_POrders, ENPublishingOrder publishingOrder, ENNew newBook, int quantity)
 {
     this.idLines_POrders = idLines_POrders;
     this.publishingOrder = publishingOrder;
     this.newBook = newBook;
     this.quantity = quantity;
     cad = new CADLinePublishingOrder();
 }
 public ENLinePublishingOrder()
 {
     cad = new CADLinePublishingOrder();
 }