diff --git a/src/Bing.Elasticsearch/Bing.Elasticsearch.xml b/src/Bing.Elasticsearch/Bing.Elasticsearch.xml
index 96e3618..5e851d8 100644
--- a/src/Bing.Elasticsearch/Bing.Elasticsearch.xml
+++ b/src/Bing.Elasticsearch/Bing.Elasticsearch.xml
@@ -938,7 +938,7 @@
         </member>
         <member name="P:Bing.Elasticsearch.Options.ElasticsearchOptions.Prefix">
             <summary>
-            索引名称前缀
+            索引前缀（防止索引名称重复）
             </summary>
         </member>
         <member name="M:Bing.Elasticsearch.Options.ElasticsearchOptions.IsCompatibleVersion">
diff --git a/src/Bing.Elasticsearch/ElasticsearchContext.cs b/src/Bing.Elasticsearch/ElasticsearchContext.cs
index 880d4b5..6d2777b 100644
--- a/src/Bing.Elasticsearch/ElasticsearchContext.cs
+++ b/src/Bing.Elasticsearch/ElasticsearchContext.cs
@@ -117,7 +117,7 @@ public async Task<CreateIndexResponse> CreateIndexAsync(string index, string ali
         /// <param name="cancellationToken">取消令牌</param>
         public async Task CreateIndexAsync<TDocument>(string index, string alias = null, CancellationToken cancellationToken = default) where TDocument : class
         {
-            await _client.CreateIndexAsync<TDocument>(index, _options.NumberOfShards, _options.NumberOfReplicas,cancellationToken);
+            await _client.CreateIndexAsync<TDocument>(index, _options.NumberOfShards, _options.NumberOfReplicas, cancellationToken);
             if (alias.IsEmpty() == false)
                 await _client.Indices.PutAliasAsync(index, alias, ct: cancellationToken);
         }
@@ -153,9 +153,9 @@ public async Task DeleteIndexesByAliasAsync(string alias, CancellationToken canc
         {
             if (alias.IsEmpty())
                 return;
-            var indexes = await GetIndexesByAliasAsync(alias,cancellationToken);
-            foreach (var index in indexes) 
-                await DeleteIndexAsync(index,cancellationToken);
+            var indexes = await GetIndexesByAliasAsync(alias, cancellationToken);
+            foreach (var index in indexes)
+                await DeleteIndexAsync(index, cancellationToken);
         }
 
         /// <summary>
@@ -174,7 +174,7 @@ public async Task AddIndexesToAliasAsync(string alias, params string[] indexes)
         {
             if (alias.IsEmpty())
                 return;
-            foreach (var index in indexes) 
+            foreach (var index in indexes)
                 await _client.Indices.PutAliasAsync(GetIndexName(index), alias);
         }
 
@@ -185,9 +185,9 @@ public async Task AddIndexesToAliasAsync(string alias, params string[] indexes)
         /// <param name="indexes">索引名称列表。注意：必须小写</param>
         public async Task RemoveIndexesFromAliasAsync(string alias, params string[] indexes)
         {
-            if(alias.IsEmpty())
+            if (alias.IsEmpty())
                 return;
-            foreach (var index in indexes) 
+            foreach (var index in indexes)
                 await _client.Indices.DeleteAliasAsync(GetIndexName(index), alias);
         }
 
@@ -211,7 +211,7 @@ public async Task RemoveIndexesFromAliasAsync(string alias, params string[] inde
         /// <param name="index">索引名称。注意：必须小写</param>
         /// <param name="cancellationToken">取消令牌</param>
         /// <remarks>说明：最多返回10000条</remarks>
-        public async Task<List<TDocument>> GetAllAsync<TDocument>(string index = null, CancellationToken cancellationToken = default) 
+        public async Task<List<TDocument>> GetAllAsync<TDocument>(string index = null, CancellationToken cancellationToken = default)
             where TDocument : class
         {
             index = GetIndexName(Helper.SafeIndexName<TDocument>(index));
@@ -241,7 +241,7 @@ public async Task<TDocument> FindByIdAsync<TDocument>(object id, string index =
         /// <param name="ids">文档标识集合</param>
         /// <param name="index">索引名称。注意：必须小写</param>
         /// <param name="cancellationToken">取消令牌</param>
-        public async Task<IEnumerable<TDocument>> FindByIdsAsync<TDocument>(IEnumerable<string> ids, string index = null, CancellationToken cancellationToken = default) 
+        public async Task<IEnumerable<TDocument>> FindByIdsAsync<TDocument>(IEnumerable<string> ids, string index = null, CancellationToken cancellationToken = default)
             where TDocument : class
         {
             index = GetIndexName(Helper.SafeIndexName<TDocument>(index));
@@ -259,7 +259,7 @@ public async Task<IEnumerable<TDocument>> FindByIdsAsync<TDocument>(IEnumerable<
         /// <param name="ids">文档标识集合</param>
         /// <param name="index">索引名称。注意：必须小写</param>
         /// <param name="cancellationToken">取消令牌</param>
-        public async Task<IEnumerable<TDocument>> FindByIdsAsync<TDocument>(IEnumerable<long> ids, string index = null, CancellationToken cancellationToken = default) 
+        public async Task<IEnumerable<TDocument>> FindByIdsAsync<TDocument>(IEnumerable<long> ids, string index = null, CancellationToken cancellationToken = default)
             where TDocument : class
         {
             index = GetIndexName(Helper.SafeIndexName<TDocument>(index));
@@ -276,7 +276,7 @@ public async Task<IEnumerable<TDocument>> FindByIdsAsync<TDocument>(IEnumerable<
         /// <typeparam name="TDocument">文档类型</typeparam>
         /// <param name="index">索引名称。注意：必须小写</param>
         /// <param name="ids">文档标识集合</param>
-        public Task<IEnumerable<TDocument>> FindByIdsAsync<TDocument>(string index, params string[] ids) 
+        public Task<IEnumerable<TDocument>> FindByIdsAsync<TDocument>(string index, params string[] ids)
             where TDocument : class => FindByIdsAsync<TDocument>((IEnumerable<string>)ids, index);
 
         /// <summary>
@@ -295,7 +295,7 @@ public Task<IEnumerable<TDocument>> FindByIdsAsync<TDocument>(string index, para
         /// <param name="searchTerms">查询条件</param>
         /// <param name="index">索引名称。注意：必须小写</param>
         /// <param name="cancellationToken">取消令牌</param>
-        public async Task<ISearchResponse<TDocument>> SearchAsync<TDocument>(Func<QueryContainerDescriptor<TDocument>, QueryContainer> searchTerms = null, string index = null, CancellationToken cancellationToken = default) 
+        public async Task<ISearchResponse<TDocument>> SearchAsync<TDocument>(Func<QueryContainerDescriptor<TDocument>, QueryContainer> searchTerms = null, string index = null, CancellationToken cancellationToken = default)
             where TDocument : class
         {
             index = GetIndexName(Helper.SafeIndexName<TDocument>(index));
@@ -309,7 +309,7 @@ public async Task<ISearchResponse<TDocument>> SearchAsync<TDocument>(Func<QueryC
         /// <typeparam name="TDocument">文档类型</typeparam>
         /// <param name="selector">查询表达式</param>
         /// <param name="cancellationToken">取消令牌</param>
-        public async Task<ISearchResponse<TDocument>> SearchAsync<TDocument>(Func<SearchDescriptor<TDocument>, ISearchRequest> selector = null, CancellationToken cancellationToken = default) 
+        public async Task<ISearchResponse<TDocument>> SearchAsync<TDocument>(Func<SearchDescriptor<TDocument>, ISearchRequest> selector = null, CancellationToken cancellationToken = default)
             where TDocument : class
         {
             return await _client.SearchAsync<TDocument>(selector, cancellationToken);
@@ -334,7 +334,7 @@ public async Task<ISearchResponse<TDocument>> SearchAsync<TDocument>(Func<Search
         /// <param name="index">索引名称。注意：必须小写</param>
         /// <param name="id">文档标识</param>
         /// <param name="cancellationToken">取消令牌</param>
-        public async Task<IndexResponse> AddAsync<TDocument>(TDocument document, string index = null, object id = null, CancellationToken cancellationToken = default) 
+        public async Task<IndexResponse> AddAsync<TDocument>(TDocument document, string index = null, object id = null, CancellationToken cancellationToken = default)
             where TDocument : class
         {
             index = GetIndexName(Helper.SafeIndexName<TDocument>(index));
@@ -351,7 +351,7 @@ public async Task<IndexResponse> AddAsync<TDocument>(TDocument document, string
         /// <param name="index">索引名称。注意：必须小写</param>
         /// <param name="timeout">超时时间间隔。单位：毫秒，默认值：300000，即5分钟</param>
         /// <param name="cancellationToken">取消令牌</param>
-        public async Task<BulkResponse> BulkSaveAsync<TDocument>(IEnumerable<TDocument> documents, string index = null, double timeout = 300000, CancellationToken cancellationToken = default) 
+        public async Task<BulkResponse> BulkSaveAsync<TDocument>(IEnumerable<TDocument> documents, string index = null, double timeout = 300000, CancellationToken cancellationToken = default)
             where TDocument : class
         {
             index = GetIndexName(Helper.SafeIndexName<TDocument>(index));
@@ -369,7 +369,7 @@ public async Task<BulkResponse> BulkSaveAsync<TDocument>(IEnumerable<TDocument>
         /// <param name="id">文档标识</param>
         /// <param name="index">索引名称。注意：必须小写</param>
         /// <param name="cancellationToken">取消令牌</param>
-        public async Task<DeleteResponse> DeleteAsync<TDocument>(object id, string index = null, CancellationToken cancellationToken = default) 
+        public async Task<DeleteResponse> DeleteAsync<TDocument>(object id, string index = null, CancellationToken cancellationToken = default)
             where TDocument : class
         {
             index = GetIndexName(Helper.SafeIndexName<TDocument>(index));
@@ -383,7 +383,7 @@ public async Task<DeleteResponse> DeleteAsync<TDocument>(object id, string index
         /// <param name="document">文档</param>
         /// <param name="index">索引名称。注意：必须小写</param>
         /// <param name="cancellationToken">取消令牌</param>
-        public async Task<DeleteResponse> DeleteAsync<TDocument>(TDocument document, string index = null, CancellationToken cancellationToken = default) 
+        public async Task<DeleteResponse> DeleteAsync<TDocument>(TDocument document, string index = null, CancellationToken cancellationToken = default)
             where TDocument : class
         {
             index = GetIndexName(Helper.SafeIndexName<TDocument>(index));
@@ -408,7 +408,7 @@ public async Task<DeleteByQueryResponse> DeleteByQueryAsync<TDocument>(Func<Dele
         /// <param name="document">文档</param>
         /// <param name="index">索引名称。注意：必须小写</param>
         /// <param name="cancellationToken">取消令牌</param>
-        public async Task<UpdateResponse<TDocument>> UpdateAsync<TDocument>(TDocument document, string index = null, CancellationToken cancellationToken = default) 
+        public async Task<UpdateResponse<TDocument>> UpdateAsync<TDocument>(TDocument document, string index = null, CancellationToken cancellationToken = default)
             where TDocument : class
         {
             index = GetIndexName(Helper.SafeIndexName<TDocument>(index));
@@ -424,7 +424,7 @@ public async Task<UpdateResponse<TDocument>> UpdateAsync<TDocument>(TDocument do
         /// <param name="document">文档</param>
         /// <param name="index">索引名称。注意：必须小写</param>
         /// <param name="cancellationToken">取消令牌</param>
-        public async Task<UpdateResponse<TDocument>> UpdateAsync<TDocument>(object id, TDocument document, string index = null, CancellationToken cancellationToken = default) 
+        public async Task<UpdateResponse<TDocument>> UpdateAsync<TDocument>(object id, TDocument document, string index = null, CancellationToken cancellationToken = default)
             where TDocument : class
         {
             index = GetIndexName(Helper.SafeIndexName<TDocument>(index));
diff --git a/src/Bing.Elasticsearch/Extensions/ElasticClientExtensions.cs b/src/Bing.Elasticsearch/Extensions/ElasticClientExtensions.cs
index 23462a7..8ab2c22 100644
--- a/src/Bing.Elasticsearch/Extensions/ElasticClientExtensions.cs
+++ b/src/Bing.Elasticsearch/Extensions/ElasticClientExtensions.cs
@@ -34,12 +34,11 @@ public static async Task CreateIndexAsync<T>(this IElasticClient client,
 
             var result = await client.Indices.CreateAsync(
                 indexName,
-                x => x.Index(indexName)
+                x => x.Map<T>(m=>m.AutoMap())
                     .Settings(o =>
                         o.NumberOfShards(numberOfShards)
                             .NumberOfReplicas(numberOfReplicas)
-                            .Setting("max_result_window", int.MaxValue))
-                    .Map(m => m.AutoMap<T>()),
+                            .Setting("max_result_window", int.MaxValue)),
                 cancellationToken);
             if (!result.Acknowledged)
                 throw new ElasticsearchException($"索引[{indexName}]创建失败：{result.ServerError.Error.Reason}");
diff --git a/src/Bing.Elasticsearch/Options/ElasticsearchOptions.cs b/src/Bing.Elasticsearch/Options/ElasticsearchOptions.cs
index b3ec56c..4e517f5 100644
--- a/src/Bing.Elasticsearch/Options/ElasticsearchOptions.cs
+++ b/src/Bing.Elasticsearch/Options/ElasticsearchOptions.cs
@@ -65,7 +65,7 @@ public class ElasticsearchOptions
         public int NumberOfReplicas { get; set; } = 1;
 
         /// <summary>
-        /// 索引名称前缀
+        /// 索引前缀（防止索引名称重复）
         /// </summary>
         public string Prefix { get; set; }
 
diff --git a/tests/Bing.Elasticsearch.Tests/Models/StudentSample.cs b/tests/Bing.Elasticsearch.Tests/Models/StudentSample.cs
index 3bdf415..422a632 100644
--- a/tests/Bing.Elasticsearch.Tests/Models/StudentSample.cs
+++ b/tests/Bing.Elasticsearch.Tests/Models/StudentSample.cs
@@ -17,5 +17,7 @@ public class StudentSample
         public DateTime BirthDay { get; set; }
 
         public bool IsValid { get; set; }
+
+        public Guid UserId { get; set; }
     }
 }