title: CookieHeaderValue could not be found
body: <p>I have a C# Class library and for some reason I Am getting the following error:</p>
  
  <p>The type or namespace 'CookieHeaderValue' could not be found.</p>
  
  <p>I have </p>
  
  <pre><code>using System.Net.Http;
  using System.Net.Http.Headers;
  </code></pre>
  
  <p>And the library is in my refernces.  I am targeting .NET 4.5.2</p>