How to use OpenAPI in ASP.NET Core

How to use OpenAPI in ASP.NET Core

ASP.NET Core 6 introduced a simplified hosting model that allows us to build lightweight APIs with minimal dependencies. These minimal API projects make it easy to get our application up and running fast, by writing less boilerplate code. ASP.NET Core 7 further improved minimal APIs by adding support for filters.

Whenever you work with APIs—including minimal APIs—you will often want to document your endpoints. Fortunately, ASP.NET Core provides built-in support for the OpenAPI specification, so you can take advantage of OpenAPI and the Swagger UI to generate nice documentation for all of your APIs.

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