private async Task ExecuteOnSendMessage()
        {
            if (Selected_Contact != null & Title != null & Message != null)
            {
                IsBusy = true;
                var _restService = new RESTService();
                var Result       = await _restService.Send_Mail_Async(Selected_Contact._id, "False", Title, Message, Selected_Contact.Name);

                if (Result.Item1)
                {
                    DependencyService.Get <IMessage>().ShortAlert("Message Envoyé Avec Succes");
                    Initialize();
                    SendMessageVisible = false;
                    Selected_Contact   = null;
                    Title   = null;
                    Message = null;
                    OnPropertyChanged("Selected_Contact");
                    OnPropertyChanged("Title");
                    OnPropertyChanged("Message");
                }
                else
                {
                    SendMessageVisible = false;
                    DependencyService.Get <IMessage>().ShortAlert(Result.Item2);
                }
                IsBusy = false;
            }
            else
            {
                DependencyService.Get <IMessage>().ShortAlert("Veuillez Remplir les Champs Obligatoire !");
            }
        }