100% of those people use Jetbrains Rider and/or VScode. One used to use Visual Studio, but moved to Rider a good year ago.
C#/.NET today is what Java wanted to be, it's an actually good and comfortable modern-ish language that actually works on multiple platforms.
That seems unimportant, but being objectively the best thing going doesn’t build a community or any word-of-mouth around your product.
I’d love to think we’d see a thriving Nuget scene on the order of npm or gem, but if it was going to happen it would’ve happened by now.
But having done a good 15 years of Enterprise Java professionally and having moved to C# for the last half decade, there isn't enough money in my country's IT salaries for me to go back to Java. It's not just the language, it's the whole ecosystem that's icky compared to C#/.NET.
Make sure to rebrand the whole thing, though. References to "C#" and ".NET" shouldn't appear anywhere except on the project's /about/history page.
Everything is cross-compiled or cross-translated to something else. I write C# for Unity and it translates it to something that'll run on iOS, which definitely doesn't have the CLR natively in it.