Restart a windows tablet from a UWP application?

Question

I have UWP application running at kiosk mode in Tablet with Window 10. I would like to restart Tablet from my app. My installed UWP SDK version is - 10.0.18362.0. So I added into manifest:

<Package
 xmlns="http://schemas.microsoft.com/appx/manifest/foundation/windows10"
 xmlns:mp="http://schemas.microsoft.com/appx/2014/phone/manifest"
 xmlns:uap="http://schemas.microsoft.com/appx/manifest/uap/windows10"
 xmlns:iot="http://schemas.microsoft.com/appx/manifest/iot/windows10"
 IgnorableNamespaces="uap mp iot">

  <Capabilities>
     <Capability Name="internetClient" />
     <!-- Add the capability here -->
     <iot:Capability Name="systemManagement" />
     <DeviceCapability Name="wifiControl" />
     <DeviceCapability Name="bluetooth" />

And try to restart system in button event handler:

    private async void OnClick(object sender, RoutedEventArgs e)
    {
        await Dispatcher.RunAsync(CoreDispatcherPriority.High, () =>
        {
            ShutdownManager.BeginShutdown(ShutdownKind.Restart, TimeSpan.FromSeconds(3));
        });
    }

And I get the error:

System.UnauthorizedAccessException - (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED))

There is my extensions:

I couldn't find Windows IoT Extension there. Maybe this is the reason? How can I restart my tablet programmably.

UPD: I installed SDK with IoT Extension and added reference it does't help.

Answer 1

I'm afraid your tablet doesn't support this operation you want to achieve. This API only supports Windows IOT devices. It applies to the device with Windows IOT system.