public override void ShowDialog(PropertyValue propertyValue, IInputElement commandSource)
        {
            ModelPropertyEntryToModelItemConverter converter = new ModelPropertyEntryToModelItemConverter();

            ModelPropertyEntryToModelItemConverter.Container container = (ModelPropertyEntryToModelItemConverter.Container)converter.Convert(propertyValue, null, null, null);
            SendContentDialog.ShowDialog(container.ModelItem, container.Context, container.WorkflowViewElement);
        }
 void OnDefineButtonClicked(object sender, RoutedEventArgs args)
 {
     using (EditingScope scope = this.Context.Services.GetRequiredService <ModelTreeManager>().CreateEditingScope(StringResourceDictionary.Instance.GetString("editSendContent"), true))
     {
         if (SendContentDialog.ShowDialog(this.ModelItem, this.Context, this))
         {
             scope.Complete();
         }
     }
 }