Patterns, gotchas and small wins from fifteen-odd years of .NET and web work — the Regira packages and modules, entity pipelines, editorial front-ends and everything between.
Every form in the app shows saving, saved or failed the same way, instead of each one re-inventing it. One small object carries the state, and one panel shows it.
A quick look at turning a flat collection with parent references into a navigable hierarchy, without writing recursion yourself.
Keep file storage behind one interface and let each environment choose disk, network share or Azure in configuration. Tests run without cloud credentials, and moving your files later is a copy job, not a rewrite. Uploads are typed by the server, so none can pose as a page of your site.