private void SupprimerOption(object sender, EventArgs args)
 {
     if (sender != null)
     {
         ListeDemandeOptions.Remove(sender as OptionDemandeVueModel);
     }
 }
        private void addOption()
        {
            DemandeOption dOpt = new DemandeOption();

            dOpt.NbJour            = 0;
            dOpt.IdChambreReservee = ID;
            OptionDemandeVueModel optVM = new OptionDemandeVueModel(dOpt);

            optVM.suppresion += SupprimerOption;
            ListeDemandeOptions.Add(optVM);
            NotifyPropertyChanged();
        }