title: Regular Expression (C#) For CSV by RFC 4180
body: <p>Requires universal CSV parser by <a href="https://www.rfc-editor.org/rfc/rfc4180" rel="nofollow noreferrer">specification RFC 4180</a>.
  There is the csv file, with all the problems of the specification:</p>
  <p>Excel opens the file as it is written in the specification:</p>
  <p>Anyone does work regex for parse it?</p>
  <p>CSV File</p>
  <blockquote>
  <p>&quot;a<br/>
  b<br/>
  c&quot;,&quot;x<br/>
  y<br/>
  z&quot;,357<br/>
  test;test,xxx;xxx,152<br/>
  &quot;test2,test2&quot;,&quot;xxx2,xxx2&quot;,123<br/>
  &quot;test3&quot;&quot;test3&quot;,&quot;xxx3&quot;&quot;xxx3&quot;,987<br/>
  ,qwe,13<br/>
  asd,123,<br/>
  ,,<br/>
  ,123,<br/>
  ,,123<br/>
  123,,<br/>
  123,123<br/></p>
  </blockquote>
  <p>Expected Results</p>
  <p><img src="https://i.stack.imgur.com/ACOAT.png" alt="Table by EXCEL" /></p>