C# ElasticSearch-嵌套不区分大小写

我试图在索引中搜索“Example1”，但实际上，只有在索引“Example1”中搜索确切的值，我才能得到结果。我会让这个搜索变得不敏感。这是我的代码：

创建索引：

var createIndexResponse = client.Indices.Create(defaultIndex, c => c
                          .Map<ObjectInIndex>(mp => mp
                          .AutoMap())

---

你能显示索引映射吗？

var pool = new SingleNodeConnectionPool(new Uri(_elasticsearchSettings.Uri));

var settings = new ConnectionSettings(pool)
.DefaultIndex(defaultIndex)
.DisableDirectStreaming()
.PrettyJson();

var client = new ElasticClient(settings);

var searchResponse = client.SearchAsync<ObjectInIndex>(s => s
                    .Explain()
                    .Source(sf => sf)
                    .Query(qn => qn
                    .MultiMatch(c => c
                    .Query(queryValue)))).Result;

    "hits": [
        {
            "_index": "sql",
            "_type": "_doc",
            "_id": "PkSsC4QBsIJTwWG9TUY1",
            "_score": 17.879944,
            "_source": {
                "title": "EXAMPLE1"
            }
         }