protected override async void OnNavigatedTo(NavigationEventArgs e)
        {
            var result = await Service.GetAll();

            result.ForEach(x => AircraftTypes.Add(x));
            lastId = AircraftTypes.LastOrDefault().Id;
        }
 private async void BtnCreate_OnClick(object sender, RoutedEventArgs e)
 {
     Canvas.Visibility = Visibility.Collapsed;
     if (isCreate)
     {
         var stewardess = ReadTextBoxesData();
         if (stewardess != null)
         {
             try
             {
                 await Service.Create(stewardess);
             }
             catch
             {
                 Info.Text = "Server error!";
             }
             lastId++;
             stewardess.Id = lastId;
             AircraftTypes.Add(stewardess);
             isCreate = false;
             CreateInfo();
             Info.Text = "Choose new action!";
         }
     }
     else
     {
         CreateInfo();
         isCreate  = true;
         Info.Text = "Info : Input data and press 'Create' ";
     }
 }