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Tag: swagger

2 posts

2026-08-19 errors openapi swagger

Fix: Swagger UI shows Unable to render this definition after upgrading to .NET 11

ASP.NET Core 11 emits openapi 3.2.0 by default and Swagger UI below 10.1.5 rejects it. Upgrade Swashbuckle.AspNetCore.SwaggerUI, or pin OpenApiVersion back to OpenApi3_1.

2026-04-28 aspnetcore openapi swagger

How to add OpenAPI authentication flows to Swagger UI in .NET 11

In .NET 11 the OpenAPI document is generated by Microsoft.AspNetCore.OpenApi and Swagger UI is no longer in the template. Here is how to wire Bearer, OAuth2 with PKCE, and OpenID Connect so the Authorize button actually works.