diff --git a/DataBaseServer/GameFrameX.DBServer/DbService/MongoDB/MongoDBExtensions.cs b/DataBaseServer/GameFrameX.DBServer/DbService/MongoDB/MongoDBExtensions.cs
deleted file mode 100644
index 734e5346..00000000
--- a/DataBaseServer/GameFrameX.DBServer/DbService/MongoDB/MongoDBExtensions.cs
+++ /dev/null
@@ -1,21 +0,0 @@
-using MongoDB.Driver;
-
-namespace GameFrameX.DBServer.DbService.MongoDB;
-
-/// <summary>
-/// MongoDB扩展
-/// </summary>
-public static class MongoDbExtensions
-{
-    /// <summary>
-    /// 获取指定类型的MongoDB集合。
-    /// </summary>
-    /// <typeparam name="TDocument">文档的类型。</typeparam>
-    /// <param name="self">要操作的MongoDB数据库。</param>
-    /// <param name="settings">集合的设置。</param>
-    /// <returns>指定类型的MongoDB集合。</returns>
-    public static IMongoCollection<TDocument> GetCollection<TDocument>(this IMongoDatabase self, MongoCollectionSettings settings = null)
-    {
-        return self.GetCollection<TDocument>(typeof(TDocument).FullName, settings);
-    }
-}
\ No newline at end of file
diff --git a/DataBaseServer/GameFrameX.DBServer/DbService/MongoDB/MongoDbService.cs b/DataBaseServer/GameFrameX.DBServer/DbService/MongoDB/MongoDbService.cs
index 1264c7b7..93509b61 100644
--- a/DataBaseServer/GameFrameX.DBServer/DbService/MongoDB/MongoDbService.cs
+++ b/DataBaseServer/GameFrameX.DBServer/DbService/MongoDB/MongoDbService.cs
@@ -27,7 +27,7 @@ public class MongoDbService : IGameDbService
         /// </summary>
         /// <param name="url">MongoDB连接URL。</param>
         /// <param name="dbName">要使用的数据库名称。</param>
-        public async void Open(string url, string dbName)
+        public void Open(string url, string dbName)
         {
             try
             {
@@ -47,11 +47,12 @@ public async void Open(string url, string dbName)
         /// 获取指定类型的MongoDB集合。
         /// </summary>
         /// <typeparam name="TState">文档的类型。</typeparam>
+        /// <param name="settings">集合的设置。</param>
         /// <returns>指定类型的MongoDB集合。</returns>
-        private IMongoCollection<TState> GetCollection<TState>() where TState : ICacheState, new()
+        private IMongoCollection<TState> GetCollection<TState>(MongoCollectionSettings settings = null) where TState : ICacheState, new()
         {
             var collectionName = typeof(TState).Name;
-            IMongoCollection<TState>? collection = CurrentDatabase.GetCollection<TState>(collectionName);
+            IMongoCollection<TState> collection = CurrentDatabase.GetCollection<TState>(collectionName, settings);
             return collection;
         }
 
@@ -303,7 +304,7 @@ public async void Open(string url, string dbName)
         /// </summary>
         /// <param name="states"></param>
         /// <typeparam name="TState"></typeparam>
-        public async Task AddListAsync<TState>(List<TState> states) where TState : ICacheState, new()
+        public async Task AddListAsync<TState>(List<TState> states) where TState : class, ICacheState, new()
         {
             var collection = GetCollection<TState>();
             var cacheStates = states.ToList();
diff --git a/DataBaseServer/GameFrameX.DBServer/GameFrameX.DBServer.csproj b/DataBaseServer/GameFrameX.DBServer/GameFrameX.DBServer.csproj
index b3a4953a..99610827 100644
--- a/DataBaseServer/GameFrameX.DBServer/GameFrameX.DBServer.csproj
+++ b/DataBaseServer/GameFrameX.DBServer/GameFrameX.DBServer.csproj
@@ -3,7 +3,7 @@
     <PropertyGroup>
         <TargetFramework>net8.0</TargetFramework>
         <ImplicitUsings>enable</ImplicitUsings>
-        <Nullable>enable</Nullable>
+        <Nullable>disable</Nullable>
         <Description>GameFrameX.DBServer</Description>
         <PackageTags>GameFrameX,Lib,DBServer,Server,GameServer</PackageTags>
         <PublicSign>true</PublicSign>