title: Why I can't see xml comments from external library?
body: <p>Is it normal I can't see xml comments from external libraries?
  For example I have an external library with xml comments on methods. After making a reference to this library I was hoping that xml comments appears when I make usage of the external library; But nothing appear in the tooltip :</p>
  <p><img src="https://i.stack.imgur.com/LS5Pe.jpg" alt="screenshot" /></p>
  <p>Maybe I have to do something special when I make the build of the lib.</p>