static void Main(string[] args)
{
Paquetes pack = new Paquetes();
Proveedor dhl = new Proveedor("DHL");
dhl.register(new DHL("Alex Rodriguez"));
dhl.Id = pack.generateID();
Proveedor fedex = new Proveedor("FEDEX");
fedex.register(new FEDEX("Sammy Sosa"));
fedex.register(new FEDEX("Mike Moustakas"));
fedex.Id = pack.generateID();
Proveedor cm = new Proveedor("Correos de México");
cm.register(new CM("Adam Jones"));
cm.Id = pack.generateID();
Console.ReadLine();
}
public void attach(Paquetes pack)
{
package.Add(pack);
}