private void Button_Suivant2(object sender, RoutedEventArgs e)
        {
            CreationScene cs = new CreationScene();

            cs.Show();
            this.Close();
        }
        private void Button_Suivant(object sender, RoutedEventArgs e)
        {
            DateTime dt1;
            DateTime dt2;

            if (DateTime.TryParse(DatePicker1.Text, out dt1) && DateTime.TryParse(DatePicker2.Text, out dt2))
            {
                if (dt1 > dt2 || dt1 < DateTime.Today || dt2 < DateTime.Today || dt1 == null || dt2 == null)
                {
                    MessageBox.Show("Les dates rentrées sont incohérentes.", "ERREUR", MessageBoxButton.OK, MessageBoxImage.Error);
                    return;
                }
                else
                {
                    Model.Festival festival = new Model.Festival(TextBox1.Text, TextBox2.Text, int.Parse(TextBox5.Text), dt1, dt2); //int.Parse(ComboBox.Text)

                    CreationScene cs = new CreationScene();
                    cs.Show();
                    this.Close();
                }
            }
        }