How do we determine whether we are using Web API 1 or Web API 2?

Question

Introduce the problem

I would like to know whether we are using Web API 1 or 2. My own packages.config indicates version 5.0.0. Is that Web API 1 or 2?<

Answer 1

I always try this instead -

In the controller make a method

public IHttpActionResult MyResult(){
    return Ok();
}

If you get compilation error then it is API 1.0.

If no compilation error then you are referencing API 2.0.