title: How to remove a single Attribute (e.g. ReadOnly) from a File?
body: <p>Let say, a file has the following attributes: <code>ReadOnly, Hidden, Archived, System</code>.
  <strong>How can I remove only one Attribute?</strong> (for example ReadOnly)</p>
  
  <p>If I use the following, it removes all the attributes:</p>
  
  <pre><code>IO.File.SetAttributes("File.txt",IO.FileAttributes.Normal)
  </code></pre>