title: Create a column dropdown in EPPlus
body: <p>I have everything else worked out but I want to put a drop down on a cell (range of cells) so that users are forced to select from the list. </p>
  
  <p>I've tried this:</p>
  
  <pre><code>                var dd = worksheet.Cells[5, 3, row, 3].DataValidation.AddListDataValidation() as ExcelDataValidationList;
                  dd.AllowBlank = true;
                  //Add list here
  </code></pre>
  
  <p>But I can't find any method or property that allows me to link the list.</p>
  
  <p>How is this done? I can't find any documentation on it.</p>