Snackbar DeactivateStoryboardCompletedEvent Bug

Personne n'a encore pris cette issue.

I think this is a bug...

**.../MaterialDesignThemes.Wpf/Snackbar.cs**

```

public static readonly RoutedEvent DeactivateStoryboardCompletedEvent = EventManager.RegisterRoutedEvent(
nameof(DeactivateStoryboardCompleted), RoutingStrategy.Bubble, typeof(SnackbarMessageEventArgs), typeof(Snackbar));

public event RoutedPropertyChangedEventHandler DeactivateStoryboardCompleted
{
add => AddHandler(DeactivateStoryboardCompletedEvent, value);
remove => RemoveHandler(DeactivateStoryboardCompletedEvent, value);
}

private static void OnDeactivateStoryboardCompleted(IInputElement snackbar, SnackbarMessage message)
{
var args = new SnackbarMessageEventArgs(DeactivateStoryboardCompletedEvent, message);
snackbar.RaiseEvent(args);
}

```

Prompt type mismatch when I register events...

I didn't look at all the code. Maybe it's right?

```

public static readonly RoutedEvent DeactivateStoryboardCompletedEvent = EventManager.RegisterRoutedEvent(
nameof(DeactivateStoryboardCompleted), RoutingStrategy.Bubble, typeof(RoutedPropertyChangedEventHandler), typeof(Snackbar));

public event RoutedPropertyChangedEventHandler DeactivateStoryboardCompleted
{
add => AddHandler(DeactivateStoryboardCompletedEvent, value);
remove => RemoveHandler(DeactivateStoryboardCompletedEvent, value);
}

private static void OnDeactivateStoryboardCompleted(IInputElement snackbar, SnackbarMessage message)
{
var snackbarMessageEventArgs = new SnackbarMessageEventArgs(DeactivateStoryboardCompletedEvent, snackbar, message);
var args = new RoutedPropertyChangedEventArgs(snackbarMessageEventArgs, snackbarMessageEventArgs, DeactivateStoryboardCompletedEvent);
snackbar.RaiseEvent(args);
}

```

Commencez dans MaterialDesignThemes.Wpf/Snackbar.cs et examinez ensemble l’enregistrement de l’événement DeactivateStoryboardCompleted, la déclaration du délégué et l’appel à OnDeactivateStoryboardCompleted. Vérifiez les types d’événements routés WPF concernés et générez le projet pour confirmer que l’incompatibilité de types signalée est résolue sans introduire une autre erreur de signature d’événement.

Rédigé par le modèle d'indexation à partir du texte de l'issue.