C# rafraichir listBox form ac autre form

Form2 frm = new Form2(this);
            frm.Show();

private Form1 _form1;

        public Form2(Form1 form1)
        {
            InitializeComponent();
            _form1 = form1;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            _form1.listBox1.Items.Add("Stri"); // exemple
        }

Modifiers

private

internal

Synchro syncho = new Synchro();
synchro.Closed += new EventHandler(frm_Closed);
synchro.show();

 void frm_Closed(object sender, EventArgs e)
        {
            // ton code de raffrachissement de ta listbox
        }

private void buttonSynchro_Click(object sender, EventArgs e)
        {
            FrmSynchro maFrmSynchro = new FrmSynchro();
            maFrmSynchro.Closed += new EventHandler(frm_Closed);
            maFrmSynchro.Show();
        }

        void frm_Closed(object sender, EventArgs e)
        {
            // ton code de raffrachissement de ta listbox
            this.filmsTableAdapter.Fill(this.databaseFilmothequeDataSetListFilms.Films);
                Console.WriteLine("iciiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii");
                    
        }