BooksCacheClient.ViewModels.BooksViewModel.ShowConnectionErrorAsync C# (CSharp) Метод

        private async Task ShowConnectionErrorAsync(AppServiceConnectionStatus status)
        {
            string error = null;
            switch (status)
            {
                case AppServiceConnectionStatus.AppNotInstalled:
                    error = "The Book Cache service is not installed.Deploy the BooksCacheProvider.";
                    break;
                case AppServiceConnectionStatus.AppUnavailable:
                    error = "The Book Cache service is not available. Maybe an update is in progress, or the app location is not available";
                    break;
                case AppServiceConnectionStatus.AppServiceUnavailable:
                    error = "The Book Cache service is not available";
                    break;
                case AppServiceConnectionStatus.Unknown:
                    error = "Unknown error";
                    break;
                default:
                    break;
            }

            await new MessageDialog(error).ShowAsync();
        }
    }