public FormCommandesBis()
 {
     InitializeComponent();
     dgvCommandes.SelectionChanged += DgvCommandes_SelectionChanged;
     btnRechercheOK.Click          += BtnRechercheOK_Click;
     btnImportXML.Click            += (object sender, EventArgs e) => _lstCommandes = DAL.ImporterXml();
     btnExportXML.Click            += (object sender, EventArgs e) => DAL.ExporterXml(_lstCommandes);
 }