private void button1_Click(object sender, EventArgs e)
        {
            DemoApplication.Entity.Person item = new Entity.Person();
            item.Name   = txtname.Text;
            item.Prenom = txtprenom.Text;
            item.Ville  = listville.SelectedItem.ToString();

            DemoApplication.Provider.PersonProvider provider = new Provider.PersonProvider();
            provider.Add(item);
            MessageBox.Show("ce bon");

            txtname.Text = txtprenom.Text = null;
        }
 private void ListPersone_Load(object sender, EventArgs e)
 {
     DemoApplication.Provider.PersonProvider provider = new Provider.PersonProvider();
     dataGridView1.DataSource = provider.GetLists();
 }