openapi

Contract first OpenAPI development (but still use Swagger UI with ASP.NET Core)

In C# and .NET land, we’re pretty heavy on the code first approaches, with the odd exception. Let’s take a look at a possible contract first approach to API development, with OpenAPI, but still taking advantage of existing tooling that we’ve come to rely on, like Swagger UI.

OpenAPI extensions and Swashbuckle

Let’s take a quick look at OpenAPI extensions (which I discovered were a thing last week 😛) and how to add them to our API description using ASP.NET Core and Swashbuckle.