title: Why can't I add the newtonsoft.Json.dll ref to my project?
body: <p>I am trying to add a reference 'Newtonsoft.Json.dll' I have followed what he has asked. which adds this ref from 'browse' tab to 'recent' tab. If I look at the list of refs from the ref list it is listed but with a yellow flag.</p>
  <p>When I hold the cursor over the flag it says: not available as it does not exist, or is not built?? So I have removed it from the list of ref's and try to re-add it.</p>
  <p>It only appears in the 'recent' section and when I add it, I get:</p>
  <p>A reference to 'Newtonsoft.Json.dll' could not be added.</p>