[C#] Decide how to read message lengths - little-endian or machine dependent

[asfimport]

See the discussion [here|[https://github.com//pull/5280#discussion_r323896532]]. We are currently reading message lengths using machine dependent endianness. Should this be changed to little-endian all the time?

It appears the C++ implementation does this same thing - use machine dependent endianness.

Reporter: Eric Erhardt / @eerhardt

_{Note: This issue was originally created as ARROW-6553. Please see the migration documentation for further details.}

[thisisnic]

This issue has been closed due to having no activity since 2019 or earlier. Feel free to reopen if this has been closed in error.