private async void save() { Requesting = true; var value = await Service.initiatePaiement(lastName, firstName, SecretCode, cardNumber, Devise, Panier.getTotal()); if (value == ActionEvent.Pay_Success) { Panier.Books.Clear(); FirstName = string.Empty; LastName = string.Empty; CardNumber = string.Empty; SecretCode = string.Empty; Messenger.Default.Send(ActionEvent.BagChanged); } Requesting = false; Messenger.Default.Send(value); }