title: C#: Make Excel file visible while editing (EpPlus)
body: <p>I'm trying to open an Excel file to view the changes as it is taking place (via epplus).
  But I can't find the correct Open/Visible method.</p>
  
  <pre><code>FileInfo newFile = new FileInfo("C:\\Users\\James\\Desktop\\Book.xls");
  ExcelPackage pck = new ExcelPackage(newFile);
  
  //Make Excel sheet visible
  ????
  
  //Add the Content sheet
  var ws = pck.Workbook.Worksheets.Add("Content");
  ws.Column(4).OutlineLevel = 1;
  ....
  </code></pre>