Well, those haters are just stupid. That ecosystem is probably better to work in now than it ever has been and both of those languages are have a great developer experience.

LINQ is powerful technology. Don't let anyone snub their noses at you.

If the only options for professional engagement were the languages popular with the HN commentariat (Python, Golang, Rust), I'd probably slit my wrists.

I've worked with loads of languages -- even PHP and Perl -- and would do it again without a second thought for the right company/project.