title: Opening Excel Document using EPPlus
body: <p>I am trying to open an Excel document using EPPlus reference/package. I can't get the Excel application to open. What code am I missing?</p>
  
  <pre><code>protected void BtnTest_Click(object sender, EventArgs e)
  {
       FileInfo newFile = new FileInfo("C:\\Users\\Scott.Atkinson\\Desktop\\Book.xls");
  
       ExcelPackage pck = new ExcelPackage(newFile);
       //Add the Content sheet
       var ws = pck.Workbook.Worksheets.Add("Content");
       ws.View.ShowGridLines = false;
  
       ws.Column(4).OutlineLevel = 1;
       ws.Column(4).Collapsed = true;
       ws.Column(5).OutlineLevel = 1;
       ws.Column(5).Collapsed = true;
       ws.OutLineSummaryRight = true;
  
       //Headers
       ws.Cells["B1"].Value = "Name";
       ws.Cells["C1"].Value = "Size";
       ws.Cells["D1"].Value = "Created";
       ws.Cells["E1"].Value = "Last modified";
       ws.Cells["B1:E1"].Style.Font.Bold = true;
  }
  </code></pre>
  
  <p>I have tried <code>pck.open(newFile);</code>, but it doesn't allow it ...</p>