title: What is a regular expression for the format of these MAC Address?
body: <p>Format as below:</p>
  
  <ul>
  <li>0060.9f9f.b990</li>
  <li>00af.1fc0.3e6d</li>
  </ul>
  
  <p>I'm working on the visual studio validation check, I have tons of mac address and I'm trying to find a regular expression fits all these mac address as the format shown.</p>