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Editorial Team
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Asked: 2026-06-17T07:34:51+00:00

The RootFrame = line in this code, all of which is auto-generated: private void

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The “RootFrame = ” line in this code, all of which is auto-generated:

private void InitializePhoneApplication()
{
    if (phoneApplicationInitialized)
        return;

    // Create the frame but don't set it as RootVisual yet; this allows the splash
    // screen to remain active until the application is ready to render.
    RootFrame = new PhoneApplicationFrame();
    RootFrame.Navigated += CompleteInitializePhoneApplication;

    // Handle navigation failures
    RootFrame.NavigationFailed += RootFrame_NavigationFailed;

    // Handle reset requests for clearing the backstack
    RootFrame.Navigated += CheckForResetNavigation;

    // Ensure we don't initialize again
    phoneApplicationInitialized = true;
}

…fails with:

*System.TypeInitializationException was unhandled by user code HResult=-2146233036 Message=The type initializer for
‘TaSLS_PhoneApp.App’ threw an exception. Source=TaSLS_PhoneApp
TypeName=TaSLS_PhoneApp.App StackTrace:
at TaSLS_PhoneApp.App.set_RootFrame(PhoneApplicationFrame value)
at TaSLS_PhoneApp.App.InitializePhoneApplication()
at TaSLS_PhoneApp.App..ctor() InnerException: System.NotImplementedException
HResult=-2147467263
Message=The method or operation is not implemented.
Source=Windows
StackTrace:
at Windows.Storage.ApplicationData.get_RoamingSettings()
at TaSLS_PhoneApp.App..cctor()
InnerException:*

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1 Answer

  1. Editorial Team

    The root cause isn’t the generated code, but your code that it is calling…

    TaSLS_PhoneApp.App.InitializePhoneApplication() at TaSLS_PhoneApp.App..ctor()
    InnerException: System.NotImplementedException HResult=-2147467263 Message=The method or
    operation is not implemented. Source=Windows StackTrace: at
    Windows.Storage.ApplicationData.get_RoamingSettings() at TaSLS_PhoneApp.App..cctor()
    InnerException:*

    It looks like in your app’s InitializePhoneApplication is calling a WinRT function which isn’t implemented on Windows phone 8. See MSDN documentation at:
    http://msdn.microsoft.com/en-gb/library/windows/apps/windows.storage.applicationdata.roamingsettings.

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