/// <inheritdoc/>
public virtual async Task <bool> ExistsFileAsync(string filename, CloudStorageCredentials credentials)
{
List <string> filenames = await ListFileNamesAsync(credentials);
return(filenames.Contains(filename, StringComparer.InvariantCultureIgnoreCase));
}
/// <inheritdoc/> public abstract Task <List <string> > ListFileNamesAsync(CloudStorageCredentials credentials);
/// <inheritdoc/> public abstract Task <byte[]> DownloadFileAsync(string filename, CloudStorageCredentials credentials);
/// <inheritdoc/> public abstract Task DeleteFileAsync(string filename, CloudStorageCredentials credentials);
/// <inheritdoc/> public abstract Task UploadFileAsync(string filename, byte[] fileContent, CloudStorageCredentials credentials);
