Thank you for the screen shots.
In order to assist you best I need further details.
1. What is "ObjectRepository"? Where do you get this class from and how it is implemented.
2. It this TextBlock in the main window of the application?
3. Could you please try out this sample code which uses Applications class:
If the issue persists could you please send us your WPF application so we can review it and give you a solution.
Hope to hear from you soon.