title: WPF Desinger window does not render the view in Visual studio 2012
body: <p>I am using Visual studio 2012 and working with WPF, whenever i create a new widow, then it's designer window is not shown. However,when we run the application,dialog is displayed.
  But my question is this why i can't see the designer of WPF dialog while i am writing xaml want to see effects on designer. </p>
  
  <p>Is this an issue with Visual studio 2012 because this happening on all the developer machines in my company.</p>
  
  <p>Is there any patch setup for visual studio other than upate1 and update2 that i have already installed for my visual studio but nothing has been fixed up by now.</p>