public MainWindow()
        {
            InitializeComponent();
            LocalPersonne = new ViewModel.VM_Personne();
            LocalStock    = new ViewModel.VM_Stock();
            LocalVente    = new ViewModel.VM_Vente();

            ficheInfoVentes.DataContext = LocalVente;
            ficheInfoClient.DataContext = LocalPersonne;
            ficheInfoStock.DataContext  = LocalStock;

            remplirCbPaiement();
        }
 private void ActualiserDataGridStock()
 {
     LocalStock = new ViewModel.VM_Stock();
     ficheInfoStock.DataContext = LocalStock;
 }