public override void Assign(RepositoryItem item)
        {
            base.Assign(item);
            RepositoryItemCustomSearchLookUpEdit source = item as RepositoryItemCustomSearchLookUpEdit;

            Events.AddHandler(_updateDisplayFilter, source.Events[_updateDisplayFilter]);
        }
 static CustomSearchLookUpEdit()
 {
     RepositoryItemCustomSearchLookUpEdit.RegisterCustomEdit();
 }