private void button6_Click(object sender, EventArgs e)
        {
            AddEQuipment formUpdate5 = new AddEQuipment("Update");
            int          index5      = FFood1.ListeQuipment.IndexOf(this.eQuipmentSelected);

            AddEQuipment.eQuipment.ID   = eQuipmentSelected.ID;
            AddEQuipment.eQuipment.Name = eQuipmentSelected.Name;
            AddEQuipment.eQuipment.Unit = eQuipmentSelected.Unit;
            AddEQuipment.eQuipment.Kind = eQuipmentSelected.Kind;
            AddEQuipment.eQuipment.DateOfManufacture = eQuipmentSelected.DateOfManufacture;

            formUpdate5.ShowDialog();

            EQuipment d = (EQuipment)ListeQuipment[index5];

            d.ID   = AddEQuipment.eQuipment.ID;
            d.Name = AddEQuipment.eQuipment.Name;
            d.Unit = AddEQuipment.eQuipment.Unit;
            d.Kind = AddEQuipment.eQuipment.Kind;
            d.DateOfManufacture = AddEQuipment.eQuipment.DateOfManufacture;;

            AddEQuipment.eQuipment = null;
            LoadEQuipment1();
            MessageBox.Show("Update successful");
        }
        private void button4_Click(object sender, EventArgs e)
        {
            AddEQuipment formAddEquipment = new AddEQuipment("Add");

            formAddEquipment.ShowDialog();
            if (AddEQuipment.eQuipment != null)
            {
                EQuipment d5 = new EQuipment(AddEQuipment.eQuipment);


                if (string.IsNullOrEmpty(d5.ID.ToString()) || string.IsNullOrEmpty(d5.Name.ToString()) || string.IsNullOrEmpty(d5.Unit.ToString()) || string.IsNullOrEmpty(d5.Kind.ToString()) || string.IsNullOrEmpty(d5.DateOfManufacture.ToString()))
                {
                }
                else
                {
                    ListeQuipment.Add(d5);
                    MessageBox.Show("Add successful");
                    LoadEQuipment1();
                }
            }
        }