title: Regex two digit pairing
body: <p>I have the following regex I use to find numeric pairs; <code>[0-9][0-9]</code></p>
  
  <p>If the string is even length, I get exactly what I want.</p>
  
  <pre><code>string x ="1234";
  Regex.Matches(enc, @"[0-9][0-9]")
  </code></pre>
  
  <p>With the regex I get <code>12</code>,<code>34</code>.</p>
  
  <p>if I have <code>string x="12345"</code> I get <code>12</code>,<code>34</code>.  How do I modify this if I want <code>23</code>,<code>45</code>?  </p>