title: Regular expression to split string and number
body: <p>I have a string of the form:</p>
  
  <pre><code>codename123
  </code></pre>
  
  <p>Is there a regular expression that can be used with <a href="http://msdn.microsoft.com/en-us/library/system.text.regularxpressions.regex.split.aspx" rel="noreferrer"><code>Regex.Split()</code></a> to split the alphabetic part and the numeric part into a two-element string array?</p>