编译器抱怨这一行

Hits hits = searcher.Search(booleanQuery,hits_limit);

以下错误消息

Error 1 The type or namespace name ‘Hits’ could not be found (are you
missing a using directive or an assembly reference?)

我不明白,根据你需要的在线教程,是Lucnen.Net.Search

任何建议

// validation
if (subqueries.Count == 0) return new List<MATS_Doc>();
// set up lucene searcher
Searcher searcher = new IndexSearcher(_directory,false);
var hits_limit = 1000;
var analyzer = new StandardAnalyzer(Version.LUCENE_30);
BooleanQuery booleanQuery = new BooleanQuery();
foreach (Query fieldQuery in subqueries)
{
    booleanQuery.Add(fieldQuery,Occur.SHOULD);
}
//var parser = new QueryParser(Version.LUCENE_30,searchField,analyzer);
//var query = _parseQuery(searchQuery,parser);
Hits hits = searcher.Search(booleanQuery,hits_limit);
IEnumerable<MATS_Doc> results = _mapLuceneSearchResultsToDataList(hits,searcher);
analyzer.Close();
searcher.Dispose();
return results;