Hello Chris,
You can collect Java Script side telemetry with AI JS SDK right away, it should not be a problem with ASP.
For server-side telemetry, however, you can look at the examples of AI SDK for different technologies
here at ApplicationInsights-Home on GitHub. The list of the repositories has the languages/technologies and links to look for their implementation, see if you can leverage some of those.
ApplicationInsights-Home repo also has a "spec/schema" of the data that the endpoint will accept/require, so you can compose your own JSON object and send it over to AI Endpoint if none of the existing languages/snippets you'll find
in the aforementioned repos will help.
Dmitry Matveev