title: Which C# XML documentation comment tag is used for 'true', 'false' and 'null'?
body: <p>Which C# XML documentation comment tag is used for the literals <code>true</code>, <code>false</code> and <code>null</code>?</p>
  
  <p>In Microsoft's own documentation, these literals appear in <strong>bold text</strong>. For example, the documentation for the property <a href="http://msdn.microsoft.com/en-us/library/system.collections.arraylist.isfixedsize%28v=vs.110%29.aspx" rel="noreferrer">ArrayList.IsFixedSize</a> appears as:</p>
  
  <blockquote>
    <p><strong>true</strong> if the <a href="http://msdn.microsoft.com/en-us/library/System.Collections.ArrayList%28v=vs.110%29.aspx" rel="noreferrer">ArrayList</a> has a fixed size; otherwise, <strong>false</strong>. The default is <strong>false</strong>.</p>
  </blockquote>
  
  <p>None of <a href="http://msdn.microsoft.com/en-us/library/5ast78ax.aspx" rel="noreferrer">Microsoft's Recommended Tags</a> seem to apply to this situation. The best fit appears to be <a href="http://msdn.microsoft.com/en-us/library/te6h7cxs%28v=vs.120%29.aspx" rel="noreferrer">&lt;c&gt;</a>, however <code>&lt;c&gt;true&lt;/c&gt;</code> appears as <code>true</code> when the documentation is rendered by <a href="http://www.doxygen.nl/" rel="noreferrer">Doxygen</a>.</p>
  
  <p>However, using <code>&lt;b&gt;true&lt;/b&gt;</code> with Doxygen yielded bold text as I surmised that it might. But that leaves me wondering about <strong>the portability of using standard HTML tags</strong> with other documentation generation tools such as <a href="http://shfb.codeplex.com/" rel="noreferrer">Sandcastle</a> and <a href="http://www.roland-weigelt.de/ghostdoc/" rel="noreferrer">GhostDoc</a>.</p>