API documentation: Swagger / OpenAPI Use Swashbuckle.AspNetCore or NSwag for generating Swagger docs. services.AddSwaggerGen();

Short answer: pp.UseSwagger(); pp.UseSwaggerUI(); Supports: Auto-generated OpenAPI docs Try it out interface Versioning support pp.UseSwagger(); pp.UseSwaggerUI(); Supports: Auto-generated OpenAPI docs Try it out interface Versioning support pp.UseSwagger(); pp.UseSwaggerUI(); Supports: Auto-generated OpenAPI docs Try it out interface Versioning support pp.UseSwagger();… pp.UseSwaggerUI(); Supports: Auto-generated OpenAPI docs…

Real-world example (ShopNest)

A ShopNest checkout request flows through middleware, hits a minimal API or controller, uses scoped services, and returns ProblemDetails on errors.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.