title: C# Regex Match any text between tags including new lines
body: <p>Here is my regex:</p>
  
  <pre><code>\[\[START\]\]\[\[OK\]\](.*?)\[\[END\]\]
  </code></pre>
  
  <p>I want to get any text contained in <code>[[START]][[OK]]</code> and <code>[[END]]</code>.</p>
  
  <p>However when my text contains some <code>\r\n</code> characters, my regex doesn't match it.</p>
  
  <p>How can it make it work?</p>