/// <summary>
/// Reads a block via a streaming channel, which enables a more resource friendly
/// data transmission (compared to sending the whole data of the block at once).
/// </summary>
/// <param name="transferId">Identifies the transfer and resource.</param>
/// <param name="blockNumber">The number of the requested block.</param>
/// <returns>A data block which contains the data as an in-memory buffer
/// (<see cref="BufferedDataBlock.Data"/>).</returns>
public OperationResult <StreamedDataBlock> Get(string transferId, long blockNumber)
{
return(SecureFunc(() => Downloads.ReadBlockStreamed(transferId, blockNumber)));
}