protected override async Task<string> LoadAsString(string folder, string fileName)
        {
            var subFolder = await _folder.GetFolderAsync(folder);
            var file = await subFolder.GetFileAsync(fileName);

            using (var stream = await file.OpenSequentialReadAsync())
            using (var reader = new DataReader(stream))
            {
                return await reader.ReadToEndAsync();
            }
        }