title: Some Excel cells stay unpopulated, with C#
body: <p>I'm writing an application that opens an existing <code>.xlsx</code> file and writes to certain cells. </p>
  
  <p>Some cells write correctly, where others just stay blank?</p>
  
  <p>Any ideas?</p>
  
  <p>This is a snippet of code</p>
  
  <p>The same code for the cells that are and arent working, except that the index's changed </p>
  
  <pre><code>oSheet.Cells[3, 15] = "1"; // this doesnt write to the cell 
  oSheet.Cells[7, 7] = "1"; // this writes to the cell 
  </code></pre>
  
  <p>All that i could think is that there is a formatting issue in the Excel file?</p>