Netlify is used for building Jamstack sites. Once deployed, the only thing that runs is client-side JavaScript or Netlify (lambda) Functions. There is no backend. Everything is built, there is no runtime serving. ASP is, from memory (old memory now) a server-side technology like PHP, which does not run (except for build-time) on Netlify.
You might find these resources provide useful information to help you understand what is possible with Netlify