title: c# Excel-VSTO Locking unlocking cells horrendously slow
body: <p>Just wanted to ask if anyone else experienced that in certain situations locking/unlocking cells via </p>
  
  <pre><code>Globals.ThisAddIn.Application.ActiveWorkbook.ActiveSheet.Cells.Locked = True
  </code></pre>
  
  <p>takes extremely long. Speaking minutes here.
  I can provide further details to the above question. </p>