title: Error: "Exception has been thrown by the target of an invocation."
body: <p>I use VS 2008 professional, and use Unit tests.</p>
  
  <p>Sometimes, I get the error:  Error: "Exception has been thrown by the target of an invocation." </p>
  
  <p><a href="http://peitor.blogspot.com/2009/10/sometimes-it-works-sometimes-not.html" rel="nofollow noreferrer">http://peitor.blogspot.com/2009/10/sometimes-it-works-sometimes-not.html</a></p>
  
  <p>What I did and didn’t help:</p>
  
  <p>Start up Visual Studio in safe mode (parameter /SafeMode ) 
  Start up Visual Studio and reset user data (parameter /resetuserdata ) 
  I do this “devenv /safemode”, “Open solution”, “Build”, “Clean”, “Rebuild”, “Cross fingers”, “Run all tests”…  </p>
  
  <p>No solution... :'( it's nightmare..</p>
  
  <p>Any solutions, please ????</p>