public ChadderFilteredCollection(ChadderObservableCollection <T> collection, CompareDelegate order)
            : base(order)
        {
            this._collection = collection;

            collection.CollectionChanged += collection_CollectionChanged;
            collection.PropertyChanged   += collection_PropertyChanged;
            reset();
        }
 public ContactsFiltered(ChadderObservableCollection <Chadder.Client.Data.ChadderContact> lst)
     : base(lst, Compare)
 {
 }