MAC Error

Remote Server Information
Remote SSH Server version: SSH2
Remote Operating System distribution name and architecture: APC Network Management Card (firmware based)
What kind of access do you have?: Full physical and software access
Does Putty/WinSCP work?: Yes

Local Machine Information
Operating System: Windows 10 1809
.NET Framework versions installed: 1.0.3705, 1.1.4322, 2.0.50727, 3.0, 3.5, 4.0.30319

Project information
What is your target framework and architecture: x64 .NET 4.6.1
Is your project multi-threaded/complex: Initially found bug in asp.NET app, vested/debugged in simple C# console app.

Source Code
Sample Code: https://gist.github.com/vrelk/b04c27de3c0203d156511f4e41e30a33
Exceptions and Stack Trace/Call Stack: https://gist.github.com/vrelk/bc135745dd2eb3e34ecc15c0a514b1aa

File transfer related: No

Transfer over LAN or Internet?: LAN
File size in bytes: N/A
Uploading or Downloading? N/A
Does remote server have enough space to store the file? N/A
Do you have access to the file being uploaded or downloaded? N/A

Associated Putty connection: https://i.imgur.com/JG0DDZ8.png

Note: These cards are very primitive, and don't run an off-the-shelf SSH server, which is probably part of the issue, but putty works without an issue. If you want to take a stab at it, I have more cards, I might be able to get one on a public IP for you to mess around with.

リンクされたサンプルコードと例外のスタックトレースから始め、報告されている .NET および Windows 環境を使って APC Network Management Card への接続を再現します。SSH.NET で失敗する動作と、動作する PuTTY 接続を比較します。MAC エラーの原因が確認され、互換性対応の結果が明確に検証されれば完了です。