'C# Send a toast notification from a Windows Service : UnauthorizedAccessException

I try to send a Toast Notification in a Windows Service, but I have this exeption :

System.UnauthorizedAccessException: Accès refusé. (Exception de HRESULT : 0x80070005 (E_ACCESSDENIED)) à Windows.UI.Notifications.ToastNotifier.Show(ToastNotification notification)

My service run with the local system account. I tried with my personal account but it's the same.

using Microsoft.Toolkit.Uwp.Notifications;
...
ToastContentBuilder toast = new ToastContentBuilder()
                    .AddText("My title", hintMaxLines: 1)
                    .AddText("My text");
toast.Show();

Windows 10, .Net 4.8, C#

Thank you for your help !

c++sharpnotificationstoast


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