title: Another "specified named connection" Argument Exception error
body: <p>I've read several responses to this that I need to copy the app.config of my DAL project to my exe project. This is done so this is not the problem.</p>
  
  <p>What is very strange about this is that my app starts and runs fine with no problems. I do not get this at run time.</p>
  
  <p>I am getting this error in the xaml designer during design time. Not only this, but everything was working fine that last time I worked on this project. I haven't touched it for a few days. I then fired up VS2010 to work on it and now I have this error.</p>
  
  <p>For clarification I have a main window which has tabs and each tab item is split off into a seperate user control with their own view model.</p>
  
  <p>Any ideas why this is happening?</p>