title: EPPlus date format not changing correctly
body: <p>I am creating EXCEL with EPPlus, and need to change the format of Date as per the format passed (dd/mm/yyyy, mm/dd/yyyy etc.)</p>
  
  <pre><code>If (schedulestart &gt; -1) Then sheet.Column(schedulestart).Style.Numberformat.Format = fileDownload.DateFormat
  
   If (schedulefinish &gt; -1) Then sheet.Column(schedulefinish).Style.Numberformat.Format = fileDownload.DateFormat
  
  If (actualstart &gt; -1) Then sheet.Column(actualstart).Style.Numberformat.Format = fileDownload.DateFormat
  </code></pre>
  
  <p>The issue is: with above code, it changes the format of first two columns but not of thirds. and if I remove third and only change the format of two columns it changes the first column and does not change for second.</p>
  
  <p><a href="https://i.stack.imgur.com/GwftS.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/GwftS.png" alt="enter image description here"></a></p>
  
  <p>I debug and it shows correct format during debug but changes for the last column afterwords.</p>