title: How do we determine whether we are using Web API 1 or Web API 2?
body: <p><strong>Introduce the problem</strong></p>
  
  <p>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?</p>
  
  <p><strong>Search, and research</strong></p>
  
  <p>I have tried Googling the following: </p>
  
  <blockquote>
    <p>"web api 1" "web api 2"</p>
  </blockquote>
  
  <p>and</p>
  
  <blockquote>
    <p>ASP.NET Web API release history</p>
  </blockquote>
  
  <p>and </p>
  
  <blockquote>
    <p>ASP.NET Web API nuget</p>
  </blockquote>
  
  <p>The best references seem to be these two nuget pages:</p>
  
  <ul>
  <li><a href="https://www.nuget.org/packages/AspNetWebApi">ASP.NET Web API Nuget</a> seems to indicate that anything 4.* is Web API 1, </li>
  <li><a href="http://www.nuget.org/packages/Microsoft.AspNet.WebApi/5.1.2">Microsoft ASP.NET Web API 2.1 Nuget</a> that anything 5.* is Web API 2. </li>
  </ul>
  
  <p>Is that right? How would I know for sure?</p>