public async Task HandleAsync(TestNotification2 notification, CancellationToken cancellationToken = default)
        {
            MessageReceived2 = true;
            MessageReceivedCount++;

            await Task.Delay(TimeSpan.FromMilliseconds(1), cancellationToken).ConfigureAwait(false);
        }
 public void Handle(TestNotification2 notification, CancellationToken cancellationToken = default)
 {
     MessageReceived2 = true;
     MessageReceivedCount++;
 }
 public Task Handle(TestNotification2 notification, CancellationToken cancellationToken)
 {
     throw new NotImplementedException();
 }