public override void Assign(RepositoryItem item)
        {
            base.Assign(item);
            RepositoryItemMySearch rItem = item as RepositoryItemMySearch;

            if (rItem != null)
            {
                this.UseSeparator = rItem.UseSeparator;
            }
        }
 static MySearch()
 {
     RepositoryItemMySearch.RegisterRepositoryItemMySearch();
 }