I mean, fundamentally it shouldn't even be "documented". They should have a template that just does it. I should select the Service (.NET Core) template, it should give me the start, restart, stop, etc. points to start adding code, and I should be able to select Windows or Linux as build options by default.

Anything that requires I go read a blog post is a massive regression from legacy .NET Framework templates, where I never had to know how a service is built.

Visual Studio has traditionally done most of the heavy lifting on managing scaffolding, but in the past couple releases I've found things are often broken unless I go manually edit some file that I previously never had to edit which can't even be edited from within the IDE.