title: MSBuild find all directories that contains a file named xxxx
body: <p>Given a folder structure:</p>
  
  <pre><code>parentFolder
    - ChildFolder1
      - somefiletolookfor.txt
      - (other files and folder)
    - ChildFolder2
      - (other files and folder)
    - ChildFolder3
      - (other files and folder)
    - ChildFolder4
      - somefiletolookfor.txt
      - (other files and folder)
    - ChildFolder5
      - (other files and folder)
  </code></pre>
  
  <p>I would like to get the folder paths for ChildFolder1 and ChildFolder4. And for each of those folder paths I need to do a copy task.</p>