FSClient.Call.SendToVoicemail C# (CSharp) Méthode

        public void SendToVoicemail()
        {
            if (!CanSendToVoicemail())
                return;
            note = "Call sent to voicemail";
            Transfer(account.getSendVoicemailURL());
        }

 private void btnSendVoicemail_Click(object sender, RoutedEventArgs e)
 {
     call.SendToVoicemail();
 }