diff --git a/FreeSql.DbContext/FreeSql.DbContext.xml b/FreeSql.DbContext/FreeSql.DbContext.xml
index 9f17feac..2c69043d 100644
--- a/FreeSql.DbContext/FreeSql.DbContext.xml
+++ b/FreeSql.DbContext/FreeSql.DbContext.xml
@@ -120,13 +120,6 @@
             清空状态数据
             </summary>
         </member>
-        <member name="M:FreeSql.DbSet`1.RemoveAsync(System.Linq.Expressions.Expression{System.Func{`0,System.Boolean}})">
-            <summary>
-            根据 lambda 条件删除数据
-            </summary>
-            <param name="predicate"></param>
-            <returns></returns>
-        </member>
         <member name="M:FreeSql.DbSet`1.Add(`0)">
             <summary>
             添加
@@ -457,14 +450,5 @@
             <param name="that"></param>
             <returns></returns>
         </member>
-        <member name="M:Microsoft.Extensions.DependencyInjection.FreeSqlRepositoryDependencyInjection.AddFreeRepository(Microsoft.Extensions.DependencyInjection.IServiceCollection,System.Action{FreeSql.FluentDataFilter},System.Reflection.Assembly[])">
-            <summary>
-            批量注入 Repository，可以参考代码自行调整
-            </summary>
-            <param name="services"></param>
-            <param name="globalDataFilter"></param>
-            <param name="assemblies"></param>
-            <returns></returns>
-        </member>
     </members>
 </doc>
diff --git a/FreeSql.Tests/FreeSql.Tests/SqlServer/MapType/ToStringTest.cs b/FreeSql.Tests/FreeSql.Tests/SqlServer/MapType/ToStringTest.cs
index ab17e685..67f00b66 100644
--- a/FreeSql.Tests/FreeSql.Tests/SqlServer/MapType/ToStringTest.cs
+++ b/FreeSql.Tests/FreeSql.Tests/SqlServer/MapType/ToStringTest.cs
@@ -18,6 +18,7 @@ namespace FreeSql.Tests.SqlServerMapType
 
         class ToStringMap
         {
+            [Column(MapType = typeof(string))]
             public Guid id { get; set; }
 
             [Column(MapType = typeof(string))]
@@ -49,6 +50,19 @@ namespace FreeSql.Tests.SqlServerMapType
         [Fact]
         public void Enum1()
         {
+            g.sqlserver.Aop.AuditValue += new EventHandler<FreeSql.Aop.AuditValueEventArgs>((s, e) =>
+            {
+                if (e.Column.CsType == typeof(Guid) &&
+                    e.Column.Attribute.MapType == typeof(string) &&
+                    e.Value?.ToString() == Guid.Empty.ToString())
+                    e.Value = FreeUtil.NewMongodbId();
+            });
+
+            g.sqlserver.GetRepository<ToStringMap>().InsertOrUpdate(new ToStringMap
+            {
+
+            });
+
             //insert
             var orm = g.sqlserver;
             var item = new ToStringMap { };
diff --git a/FreeSql/Extensions/EntityUtilExtensions.cs b/FreeSql/Extensions/EntityUtilExtensions.cs
index 044fd446..4236a48d 100644
--- a/FreeSql/Extensions/EntityUtilExtensions.cs
+++ b/FreeSql/Extensions/EntityUtilExtensions.cs
@@ -55,6 +55,7 @@ namespace FreeSql.Extensions.EntityUtil
                     {
                         Expression newguid = Expression.Call(MethodFreeUtilNewMongodbId);
                         if (pks[a].Attribute.MapType != pks[a].CsType) newguid = FreeSql.Internal.Utils.GetDataReaderValueBlockExpression(pks[a].CsType, newguid);
+                        if (pks[a].CsType == typeof(Guid)) newguid = Expression.Convert(newguid, typeof(Guid));
                         if (pks[a].CsType == typeof(Guid?)) newguid = Expression.Convert(newguid, typeof(Guid?));
                         expthen = Expression.Block(
                             new Expression[]{