How do I register INotification with generics?

[grosch-intl]

Is there any way to use notifications with generics? I have this:

public sealed record ApprovedNotification<T>(T Checklist) : INotification 
    where T : IChecklist;

public sealed class NotificationHandler<T> : INotificationHandler<ApprovedNotification<T>>
    where T : IChecklist

When I send the notification, the handler is never called. I'm guessing I need to do some type of explicit registration?

[MattWood21]

You can use generics out of the box in almost the same way:

public record ApprovedNotification<T>(T Checklist) : INotification
    where T: IChecklist;

public sealed class NotificationHandler<T> : INotificationHandler<T>
    where T : ApprovedNotification<IChecklist>
{
    public Task Handle(T notification, CancellationToken cancellationToken)
    {
        // Do stuff
        return Task.CompletedTask;
    }
}

The differences:

• The notification type can't be sealed due to boxing/unboxing constraints
• The handler needs to the type of the notification, not the type inside the notification, though you can specify that it handles only notifications of the specified type you're looking for

[grosch-intl]

Thank you, @MattWood21 !