title: C# formatting excel column with epplus as negative number with prentices
body: <p>I am trying to get an column formatted as a number. I want it with 1000 separator and red prentices. I am using Epplus 5.7.5 and C# .net 4.72
  Some reason it just ignores this formatting.</p>
  <pre><code>workSheet.Column(4).Style.Numberformat.Format = &quot;#,##0 ;[Red](#,##0)&quot;;
  </code></pre>