IsNotEmpty( string directory,
                string message, params object[] args );

</pre></div>

<p><b>DirectoryAssert.IsWithin()</b> and <b>DirectoryAssert.IsNotWithin()</b>
test whether the second directory is a direct or indirect subdirectory
of the first directory.

<div class="code" style="width: 40em"><pre class="prettyprint">

DirectoryAssert.IsWithin( DirectoryInfo expected, DirectoryInfo actual );
DirectoryAssert.IsWithin( DirectoryInfo expected, DirectoryInfo actual,
                string mes