What does it mean popular programming languages?
From my perspective, I would only use Python (for ease of use), C++ (for low latency high speed), Java (only for useful legacy software and IB interaction), Matlab (for all the above but integrates with everything).
I will be dumping all things Microsoft including .NET due to unreliable and poor performance thanks to Windows 10
NOTE I now post my TRADING ALERTS into my personal FACEBOOK ACCOUNT and TWITTER. Don't worry as I don't post stupid cat videos or what I eat!