SocketException, TCPListener, TCPClient reason?

a) Why do I get a

SocketException

SocketException

when opening a

TCPListener

TCPListener

TCPClient

TCPClient

@ IP

127.0.0.1

127.0.0.1

, Port 5089 (there is only my listener at that port, and only my client sends on it) telling me

the system actively refused the connection

the system actively refused the connection

- however it still goes through and sends everything/gets received?! and the firewall didn't block it
b) what information to look at to know such stuff?

SocketException, TCPListener, TCPClient reason?

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SocketException, TCPListener, TCPClient reason?

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