How to configure Visual Studio 2012 to autogenerate code for binded control

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C#

WPF

EF5.0

Hello

I have problem. In this link:
http://msdn.microsoft.com/en-us/data/gg638943[^]

we can see that code is automatically generated. But when I drag and drop some entity in the same way, visual studio generate only this:

using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
 
namespace Testowy
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }
 
        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
 
            System.Windows.Data.CollectionViewSource taktTimerEntitiesViewSource = ((System.Windows.Data.CollectionViewSource)(this.FindResource("taktTimerEntitiesViewSource")));
            // Load data by setting the CollectionViewSource.Source property:
            // taktTimerEntitiesViewSource.Source = [generic data source]
        }
    }
}

I have visual studio 2012. I tried the same in Visual Studio 2010 Express but situation was the same. Can somebody help?