title: Visual Studio XML external comments file does not work
body: <p>By using <strong>include</strong> tag I am trying to put comments for my code in separate file "docs.xml".
  But it does not work. I have been trying both C# and VB.NET projects. </p>
  
  <p>Here is my comments file:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8" ?&gt;
  &lt;d&gt;
  &lt;summary&gt;Demo summary&lt;/summary&gt;
  &lt;/d&gt;
  </code></pre>
  
  <p>I have a class ABC with one single property Demo. before this property I write:</p>
  
  <pre><code>/// &lt;include file="docs.xml" path="d/*" /&gt;
  </code></pre>
  
  <p>or in VB.NET:</p>
  
  <pre><code>''' &lt;include file="docs.xml" path="d/*" /&gt;
  </code></pre>
  
  <p>However summary for ABC.Demo never appears in InteliSense / Object browser / another project (if I reference my project).</p>
  
  <p>I have a strong feeling I am missing something here.</p>
  
  <p>P.S. I have tried following "path[@name=]" pattern of XML file, but it does not help.</p>