/// <summary>
/// Initializes new instance of <see cref="StorageFileReader"/> class.
/// </summary>
/// <param name="streamFactory"><see cref="IStreamFactory"/> object used to create file streams</param>
/// <exception cref="ArgumentNullException">factory is null</exception>
public IndexFileBlockProvider(IStreamFactory streamFactory)
{
streamFactory.ThrowIfNull(nameof(streamFactory));
fileStream = streamFactory.CreateIndexStream();
fileStreamLock = new object();
}