public System.Delegate OnChangedHacked(Item item, RootItem rootItem) // WORKS
 {
     rootItem.MyText = item.Number.ToString();
     return(new DotVVM.Framework.Binding.Expressions.Command(DummyTask));
 }
 public void OnChanged(Item item, RootItem rootItem) // DOES NOT WORK
 {
     rootItem.MyText = item.Number.ToString();
 }