private void EndMaintenance_Click(object sender, RoutedEventArgs e)
{
Maintenance RecupMaintenance = dataGrid.SelectedItem as Maintenance;
MaintenanceDAL FinishMaintenance = new MaintenanceDAL();
FinishMaintenance.TerminerMaintenance(RecupMaintenance);
this.NavigationService.Navigate(new GestionMaintenance());
}