Cleaned and updated

[wforney]

• Cleaned up formatting, added editorconfig
• Commented all cs files using GhostDoc and hand editing
• Used is for == in some places
• Used LINQ and new IAsyncEnumerable in places

[madskristensen]

Thanks for the PR. All the comments you've added aren't adding any positive value, since they just state something like Gets or sets the slug.

[wforney]

Yeah, I get that. They are mostly auto-generated with GhostDoc. I used to use Sandcastle to make docs based on those. I'm on the fence about whether to ditch the auto-gen docs in my other projects too.