Here's a little tip for multi-oriented apps.
When developing a WinRT application, when creating it you can choose whether to manage several types of orientations (Portrait/Landscape).
If nothing is specified, the framework itself translates a page into a landscape or portrait, depending on the phone's orientation.
But it can be convenient to have a page that supports only Portrait visuals and other pages that support all displays!
The framework provides us with the DisplayInformation class that can change this behavior.
For example, I can only force portrait mode:
DisplayInformation.AutoRotationPreferences = DisplayOrientations.Portrait;
Or reactivate portrait and landscape mode:
DisplayInformation.AutoRotationPreferences = DisplayOrientations.Portrait | DisplayOrientations.Landscape;