title: How to set Excel margins with EPPlus
body: <p>I need to be able to set the margins (printer settings) of an Excel workbook programmatically.<br>
  I found this file:</p>
  
  <p><a href="https://github.com/ylatuya/EPPlus/blob/master/EPPlus/ExcelPrinterSettings.cs" rel="noreferrer">ExcelPrinterSettings.cs</a></p>
  
  <p>There is a class with following constructor:</p>
  
  <pre><code>ExcelPrinterSettings(XmlNamespaceManager ns,
      XmlNode topNode,ExcelWorksheet ws)
  </code></pre>
  
  <p>but I don't know what I should pass in for the first two parameters.<br>
  I already had code that makes a worksheet, so I can pass that in as 3rd parameter.</p>
  
  <p>Many thanks for any suggestions.</p>