Hi,

I'm trying to cancel creating a node and show a message in the speech bubble. This is what I tried:

private void ContentService_Creating(IContentService sender, NewEventArgs<IContent> e)
        {
            if (e.Entity.ContentType.Name == "Language" && sender.GetContentOfContentType(e.Entity.ContentType.Id).Where(c => c.Name == e.Entity.Name).Any())
            {
                ClientTools ct = new ClientTools(umbraco.BasePages.BasePage.Current);
                ct.ShowSpeechBubble(Umbraco.Web.UI.SpeechBubbleIcon.Error, "Language exists", "Creating canceled");
                e.Cancel = true;
                return;
            }
        }

but the speech bubble just shows up twice, with the default message "Document Creation / Document creation was canceled".