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.
Rules that must hold for every record, such as hiding deleted data or showing each customer only their own, set up once and applied everywhere. They also cover the endpoint added next year, and nobody skips them by accident.
Let users delete a record and still get it back: it disappears from every screen, stays in the database, and restores in one click. A recycle bin and an audit view come with it, no extra code.
Lists that users sort by several columns, that load related data only when a screen asks, and that never hand a client a million rows. Declared once, applied to every list.
Search screens that stay simple as the filters pile up: name what users can filter on once, and let the database do the work. Most APIs grow a tangle of optional parameters nobody tests instead.