Those assumptions on what you would need to get started are actually outdated. C#/.NET are updated often. No need for Visual Studio or even Windows; you can get

Those assumptions on what you would need to get started are actually outdated. C#/.NET are updated often. No need for Visual Studio or even Windows; you can get started faster with VSCode + .NET Core. And you don't even need a main function anymore; you can just start writing code at the top level in a blank file without any class.