DateTime dd1 = new DateTime(2019, 12, 8);
                DateTime dd2 = Convert.ToDateTime("01/01/2010");
                Objet_volumineux o = new Objet_volumineux(10.0, 10.0, 10.0, "Chambre", "Matelas", "Paris", 100.0, "ref1");
                Don d1 = new Don("bois", "objet1", "JeanDonneur", "1 rue des pommiers", o, 0203040506, dd2);
                DateTime dv1 = new DateTime(2019, 12, 10);
                DateTime dn1 = new DateTime(1950, 1, 2);
                Beneficiaire b1 = new Beneficiaire("anatole", dn1, "aaa", "1 rue des lilas", "Talent", 0102030405);
                Don_archive a1 = new Don_archive(d1, dd1, dv1, b1);

                DateTime dd3 = new DateTime(2019, 12, 21);
                DateTime dd4 = Convert.ToDateTime("01/02/2010");
                Objet_volumineux o2 = new Objet_volumineux(10.0, 10.0, 10.0, "cuisine", "Chaise", "Paris", 200.0, "ref2");
                Don d2 = new Don("Cuivre", "objet2", "JeanDonër", "2 rue des pommiers", o2, 0303030306, dd4);
                DateTime dv2 = new DateTime(2019, 12, 24);
                DateTime dn2 = new DateTime(1944, 2, 3);
                Beneficiaire b2 = new Beneficiaire("Patrice", dn2, "bbb", "2 rue des lilas", "Talent", 0404040406);
                Don_archive a2 = new Don_archive(d2, dd3, dv2, b2);

                List<Depot_vente> ldv = new List<Depot_vente>();
                List<Objet_dans_Depot_vente> oddv = new List<Objet_dans_Depot_vente>();
                Objet_dans_Depot_vente oddv1 = new Objet_dans_Depot_vente(d2, 10.0, dd3, dv2, b2,oddv,1000.0,"1");
                oddv.Add(oddv1);
                Objet_dans_Depot_vente oddv2 = new Objet_dans_Depot_vente(d1, 33.0, dd1, dv1, b2, oddv, 1000.0, "1");
                oddv.Add(oddv2);
                Objet_dans_Depot_vente oddv3 = new Objet_dans_Depot_vente(d2, 15.0, dd1, dd3, b2, oddv, 1000.0, "1");
                oddv.Add(oddv3);
                Depot_vente Dv = new Depot_vente(oddv,1000.0,"1");
                ldv.Add(Dv);