在wpf observablecollection中添加项目后立即更新列表框

Question

你好，我从网上获取信息，并将其添加到绑定在列表框中的ObservableCollection中，有时此信息太多，我的程序必须等到收到所有信息后再更新接口 如何显示同时添加的信息？

我的ObservableCollection类型为INotifyPropertyChanged

XAML

<ListBox ItemsSource="{Binding ItemResult}">

C＃

private ObservableCollection<ItemResultModel> _ItemResult;
        public ObservableCollection<ItemResultModel> ItemResult
        {
            get => _ItemResult;
            set
            {
                if (_ItemResult != value)
                {
                    _ItemResult = value;
                    NotifyPropertyChanged("ItemResult");
                }
            }
        }

ItemResult = new ObservableCollection<ItemResultModel>();
            HtmlWeb web = new HtmlWeb();
            HtmlDocument doc = web.Load(url);
            HtmlNode img = doc.DocumentNode.SelectSingleNode("//div[@class='poster']//img");
            if (img != null)
            {
                poster.Source = bitmap;
            }

            var repeater = doc.DocumentNode.SelectNodes("//ul[@class='scrolllist']");

            if (repeater != null)
            {
                foreach ((HtmlNode node, int index) in repeater.WithIndex())
                {
                        string translator = node.SelectNodes("//div[@class='comment-col']")[index].InnerText;
                        string download_Link = node.SelectNodes("//a[@class='download icon-download']")[index].GetAttributeValue("href", "");

                        ItemResultModel item = new ItemResultModel { Name = node.InnerText, Translator = singleLineTranslator, Link = download_Link, Language = GlobalData.Config.SubtitleLang };

                        ItemResult.Add(item);

                    }
                }