How to read multiple .cfs files from lucene.net index files in C#

using (var directory = GetDirectory())
using (var analyzer = GetAnalyzer())
using (var writer = new IndexWriter(directory, analyzer, IndexWriter.MaxFieldLength.UNLIMITED))
{
    
    foreach (var pg in lstPage)
    {
        try {
            var document = AddDoc(pg);

            if (isScheduled.ToUpper() != "T")
            {
                Term trm = new Term(pg.Id.ToString(), "Id");
                writer.DeleteDocuments(trm);
            }

            writer.AddDocument(document);

        } catch (Exception exIndx)
        {
            sbLog.AppendLine("exIndx->" + exIndx);
        }
        
    }
}

static List<Page> Search(string keywords, int limit, out int count)
{
    using (var directory = GetDirectory())
    using (var searcher = new IndexSearcher(directory))
    {
        var query = GetQuery(keywords);
        var sort = GetSort();
        var filter = GetFilter();

        var docs = searcher.Search(query, filter, limit, sort);
        count = docs.TotalHits;

        var products = new List<Page>();
        foreach (var scoreDoc in docs.ScoreDocs)
        {
            var doc = searcher.Doc(scoreDoc.Doc);
            var product = new Page
            {
                Id = int.Parse(doc.Get("Id")),
                name = doc.Get("url").Substring(doc.Get("url").LastIndexOf("/") + 1, doc.Get("url").Length - doc.Get("url").LastIndexOf("/") - 1),
                data = doc.Get("data"),
                url = doc.Get("url")
            };

            if (!products.Any(x => x.Id == product.Id)) 
            products.Add(product);
        }

        return products;
    }
}