title: I can not put single double quotes ' " ' in a string for regex pattern
body: <p>I am trying to build regex pattern but the string doesn't take single double quotes. </p>
  
  <p>this is the pattern and it crashes when I add <strong>\"</strong></p>
  
  <pre><code>@"(?&lt;\"|\'|\“)(?'first'{0}\s(?'middle'{0}{1}{2}"
  </code></pre>