The way you're asking I'd suggest you to ignore anything related to Visual Studio.
As Wirpy already said, it's an integrated development environment, a widely used one with that.
It's been talked about because the anti cheat covering EFT checks your Visual Studio files. Which could be bad for cheat developers, but at the same time is a big no-no privacy wise since they sniff around in stuff I wouldn't want them to be sniffing around. What if they get proprietary code that's none of their business.