title: Using Clipboard Copy Paste in Excel (VSTO code) freezes other Microsoft Office application
body: <p>Operating System : Microsoft Windows SP1 (64 bit)</p>
  
  <p>Office Suite : Microsoft Office 2010</p>
  
  <p>.Net Framework : 4.0</p>
  
  <p>Subject : Microsoft suites of applications (Word, Outlook) does not respond for the time slice when a excel plugin code is running</p>
  
  <p>Details : We have written  VSTO (in C#) based add-in for excel application. This add-in is used for refreshing data in current sheet.</p>
  
  <p>Following steps of events occurs on click of a "Refresh" button</p>
  
  <p>•A call is made to internal web service by passing some metadata to download a file</p>
  
  <p>•File is downloaded and stored on windows Temp folder.</p>
  
  <p>•A VSTO code is executed to copy data from downloaded sheet to current sheet using Clipboard Copy / Paste. Data is copied row by row.</p>
  
  <p>At any point in time, we'll have one row of data in Clipboard. Also the number of rows and columns varies between request.</p>
  
  <p>Issue: While refresh functionality is working as expected, we are experiencing issue with other Office suites applications (Word, Outlook).</p>
  
  <p>For the time slice refresh is running, all Office suites of application stops responding.</p>
  
  <p>Can some one help with this issue?</p>