title: Remove one directory from full directory path
body: <p>I have a directory path of <code>C:\Subdir1\Subdir2\Subdir3\filename.xml</code>.</p>
  
  <p>I need to first check if the file, <code>filename.xml</code> exists in the root of <code>"Subdir2"</code> (one level back) before looking in <code>"Subdir3"</code>.  How can I easly parse this with <code>Path.GetPathRoot(filename)</code>?</p>
  
  <p>I.E.</p>
  
  <p>First see if this is true:</p>
  
  <blockquote>
    <p>C:\Subdir1\Subdir2\filename.xml</p>
  </blockquote>
  
  <p>If not true, then default to <code>C:\Subdir1\SubDir2\Subdir3\filename.xml</code> for the file.</p>