Lua + С#

https://habr.com/ru/post/197262/

Dde native from Microsoft

https://docs.microsoft.com/en-us/windows/win32/dataxchg/about-dynamic-data-exchange

https://smart-lab.ru/blog/623805.php
https://smart-lab.ru/blog/622837.php

http://citforum.ru/programming/digest/exceldde/

DDE from osa

https://smart-lab.ru/blog/205588.php

TCP parts

Connection

Sockets
https://docs.microsoft.com/ru-ru/dotnet/api/system.net.sockets.socket.connectasync?view=netcore-3.1
https://docs.microsoft.com/ru-ru/dotnet/api/system.net.sockets.socketasynceventargs?view=netcore-3.1
https://docs.microsoft.com/ru-ru/dotnet/api/system.net.sockets.socket.connectasync?view=netcore-3.1

TcpClient
https://docs.microsoft.com/ru-ru/dotnet/api/system.net.sockets.tcpclient.connect?view=netcore-3.1
https://docs.microsoft.com/ru-ru/dotnet/api/system.net.sockets.tcpclient.connectasync?view=netcore-3.1

TCP vs UDP

https://www.youtube.com/watch?v=Vdc8TCESIg8

https://www.youtube.com/watch?v=EkNq4TrHP_U

Lua sockets

https://ilovelua.wordpress.com/%D0%BF%D0%B5%D1%80%D0%B5%D0%B4%D0%B0%D1%87%D0%B0-%D0%B4%D0%B0%D0%BD%D0%BD%D1%8B%D1%85-%D0%BF%D0%BE-%D1%81%D0%B5%D1%82%D0%B8-%D1%81-luasocket/

https://stackoverflow.com/questions/42783263/lua-tcp-ip-simple-client-server-connection

http://w3.impa.br/~diego/software/luasocket/introduction.html

https://github.com/diegonehab/luasocket/tree/master/samples

https://www.lua.org/pil/9.4.html

https://coronalabs.com/blog/2014/09/23/tutorial-local-multiplayer-with-udptcp/

https://realtimelogic.com/ba/doc/en/lua/SockLib.html

http://lua-users.org/lists/lua-l/2011-03/msg00184.html

Video
https://www.youtube.com/watch?v=qVWOaRYpli0

https://www.youtube.com/watch?v=JtuwmPC0PdE

https://www.youtube.com/watch?v=jREbAopWqKU