title: Why is my control not accessible in codebehind?
body: <p>When I create a WPF application in VS 2010 and place a button in Grid I can access the control from C# code. I have the button class instance variable with the same name as in XAML "name" field. 
  But I can't see the instance of the control when I create a WPF project using VS 2012 RC. 
  What can be the problem ? Is there any default project settings difference between VS 2010 and 2012 ? </p>