TCP/IP, TaskTimeout

https://stackoverflow.com/questions/17118632/how-to-set-the-timeout-for-a-tcpclient

https://stackoverflow.com/questions/25683980/timeout-pattern-on-task-based-asynchronous-method-in-c-sharp/25684549#25684549


HeartBeat
https://stackoverflow.com/questions/3121598/tcpclient-communication-with-server-to-keep-alive-connection-in-c

https://stackoverflow.com/questions/865987/do-i-need-to-heartbeat-to-keep-a-tcp-connection-open

https://stackoverflow.com/questions/34456104/display-message-when-tcpclient-disconnects

Keep Alive
https://stackoverflow.com/questions/169170/what-is-the-best-way-to-do-keep-alive-socket-checking-in-net

Async Socket
https://www.codeguru.com/csharp/csharp/cs_misc/sampleprograms/article.php/c7695/Asynchronous-Socket-Programming-in-C-Part-I.htm

https://docs.microsoft.com/en-us/dotnet/framework/network-programming/asynchronous-server-socket-example?redirectedfrom=MSDN

https://docs.microsoft.com/ru-ru/dotnet/api/system.net.sockets.socket.beginreceive?view=netframework-4.8

https://docs.microsoft.com/ru-ru/dotnet/api/system.net.sockets.socket.endreceive?view=netframework-4.8

ReadFromNetworkStream
https://stackoverflow.com/questions/22465102/c-sharp-read-all-bytes