Lock Orientation for UWP Application

I recently needed to prevent screen rotation in a UWP application when running on a mobile device, but the application itself supports all orientations (Landscape, Portrait, LandscapeFlipped, PortraitFlipped). In order to achieve my desired result, I added a quick static method that I found here.

This goes in App.xaml.cs:

public static bool IsMobile
{
    get
    {
        var qualifiers = Windows.ApplicationModel.Resources.Core.ResourceContext.GetForCurrentView().QualifierValues;
        return (qualifiers.ContainsKey("DeviceFamily") && qualifiers["DeviceFamily"] == "Mobile");
    }
}

Now, in my MainPageViewModel.cs, my constructor looks like this:

public MainPageViewModel()
{
    if (App.IsMobile)
    {
        DisplayInformation.AutoRotationPreferences = DisplayOrientation.Portrait;
    }
}

This will force your application to stay in Portrait mode on a mobile device, regardless of the supported orientations in your Package.appxmanifest.