title: Formatting MAC address in C#
body: <p>In my C# application, I want to get my MAC address by using <code>NetworkInterface</code> class as the following:</p>
  
  <pre><code>NetworkInterface nic in NetworkInterface.GetAllNetworkInterfaces()
  {
      mac = nic.GetPhysicalAddress()
  }
  </code></pre>
  
  <p>But this code returns the MAC without ':' or any other separator.</p>
  
  <p>How can I retrieve the MAC in this format:
  <code>88:88:88:88:87:88</code>
  <strong>using the code above ONLY?</strong></p>