title: Set cell value using Excel interop
body: <p>Ok, so I'm trying to set the value of a cell with the excel interop library.  I am able to do it with the following:</p>
  
  <pre><code>sheet.Cells[row, col] = value;
  </code></pre>
  
  <p>but it's terribly slow for how many I'm setting.  So I'm trying to go this route:</p>
  
  <pre><code>Range excelRange = sheet.UsedRange;
  excelRange.Cells.set_Item(row, col, value);
  </code></pre>
  
  <p>The code executes, but no data is put in the cell.  Any suggestions on what I'm missing?  Thanks!</p>