This release contains a number of significant changes, including a transition to Swagger/OpenAPI v3 and support for ASP.NET Core 3.0, and will require modifications to your application setup if you're upgrading from previous major versions.
OpenAPI (f.k.a Swagger) Specification code generator. Supports C#, Go, Java, Node.js, TypeScript, Python, Ruby and PHP.
AutoRest is an open source tool that generates client libraries for accessing RESTful web services.
Video Tutorial : https://azure.microsoft.com/en-us/resources/videos/inside-autorest-with-david-justice/
