How to use Swagger Codegen with .net core

I am able to integrate the Swagge UI in my web api using Swashbuckle. I also want to explore the swagger codegen feature. Can somebody help in - how I can integrate swagger codegen into my web api project? Or do I need to download any tool? I want to be able it to host the codegen and pass the json/raml form specs to generate client in .net core.

I am not able to find enough docs on above.

Thanks!