title: 15-250 regex validation
body: <p>I'm trying to build up some regular expressions to validate a textbox on c# wpf. I build the following to validate a number from 6 to 3600:</p>
  
  <pre><code>^([6-9]|[1-9][0-9]{1,2}|[12][0-9]{3}|3[0-5][0-9]{2}|3600)$ 
  </code></pre>
  
  <p>Now I need to validate from 15 to 250. I am new on regex and I am having a hard time getting it.</p>
  
  <p>Thanks</p>