WPF scoped service provider

FormulaView.cs

[GenerateDependencyProperty("Processing", typeof(bool))]
[GenerateDependencyProperty("PageSizeSelection", typeof(int[]))]
public partial class FormulaView : UserControl
{
    private readonly IMessenger messenger;

    public FormulaView()
    {
        InitializeComponent();
        var scope = App.ServiceProvider.CreateScope();
        messenger = scope.ServiceProvider.GetRequiredService<IMessenger>();

        Dispatcher.ShutdownStarted += (s, e) =>
        {
            scope.Dispose();
        };
    }

    private static partial bool DefaultProcessingProperty() => false;

    private static partial int[] DefaultPageSizeSelectionProperty() => [10, 20, 50, 100];

    private async void OnNewPointButtonClick(object sender, RoutedEventArgs e)
    {
        try
        {
            Processing = true;

            var response = await messenger.Send(new NewPointMessage("new name"));
             
            // do something...
        }
        catch (InvalidOperationException) { }
        finally
        {
            Processing = false;
        }
    }
}