title: Powershell script regex single and double quotes
body: <p>I want to replace comma with Chinese comma</p>
  <p>the code is</p>
  <pre><code>$t = $t -replace '(\p{IsCJKUnifiedIdeographs}) ,', '$1`u{ff0c}'
  </code></pre>
  <p>`u{X} works inside double quote</p>
  <pre><code>Write-Host &quot;`u{ff0c}&quot;
  </code></pre>
  <p>prints ，</p>
  <p>but</p>
  <p>if I use double quote then regex $1 will not work.</p>
  <p>What shall I do ?</p>