diff --git a/Extensions/FreeSql.Extensions.LazyLoading/FreeSql.Extensions.LazyLoading.csproj b/Extensions/FreeSql.Extensions.LazyLoading/FreeSql.Extensions.LazyLoading.csproj
index 43c2ea14..17df14ce 100644
--- a/Extensions/FreeSql.Extensions.LazyLoading/FreeSql.Extensions.LazyLoading.csproj
+++ b/Extensions/FreeSql.Extensions.LazyLoading/FreeSql.Extensions.LazyLoading.csproj
@@ -2,7 +2,7 @@
 
 	<PropertyGroup>
 		<TargetFrameworks>netstandard2.0;net45</TargetFrameworks>
-		<Version>0.6.7</Version>
+		<Version>0.6.8</Version>
 		<GeneratePackageOnBuild>true</GeneratePackageOnBuild>
 		<Authors>YeXiangQin</Authors>
 		<Description>FreeSql 扩展包，可实现【延时加载】属性.</Description>
diff --git a/FreeSql.Tests/Sqlite/Curd/SqliteSelectTest.cs b/FreeSql.Tests/Sqlite/Curd/SqliteSelectTest.cs
index 6b08d8da..de328f03 100644
--- a/FreeSql.Tests/Sqlite/Curd/SqliteSelectTest.cs
+++ b/FreeSql.Tests/Sqlite/Curd/SqliteSelectTest.cs
@@ -489,32 +489,32 @@ namespace FreeSql.Tests.Sqlite {
 			query = select.WhereIf(false, a => a.Id == 10);
 			sql = query.ToSql().Replace("\r\n", "");
 			Assert.Equal("SELECT a.\"Id\", a.\"Clicks\", a.\"TypeGuid\", a.\"Title\", a.\"CreateTime\" FROM \"tb_topic22\" a", sql);
-			query.ToList();
+			query.First();
 
 			query = select.WhereIf(false, a => a.Id == 10 && a.Id > 10 || a.Clicks > 100);
 			sql = query.ToSql().Replace("\r\n", "");
 			Assert.Equal("SELECT a.\"Id\", a.\"Clicks\", a.\"TypeGuid\", a.\"Title\", a.\"CreateTime\" FROM \"tb_topic22\" a", sql);
-			query.ToList();
+			query.First();
 
 			query = select.WhereIf(false, a => a.Id == 10).WhereIf(false, a => a.Clicks > 100);
 			sql = query.ToSql().Replace("\r\n", "");
 			Assert.Equal("SELECT a.\"Id\", a.\"Clicks\", a.\"TypeGuid\", a.\"Title\", a.\"CreateTime\" FROM \"tb_topic22\" a", sql);
-			query.ToList();
+			query.First();
 
 			query = select.WhereIf(false, a => a.Type.Name == "typeTitle");
 			sql = query.ToSql().Replace("\r\n", "");
 			Assert.Equal("SELECT a.\"Id\", a.\"Clicks\", a.\"TypeGuid\", a.\"Title\", a.\"CreateTime\" FROM \"tb_topic22\" a", sql);
-			query.ToList();
+			query.First();
 
 			query = select.WhereIf(false, a => a.Type.Name == "typeTitle" && a.Type.Guid == a.TypeGuid);
 			sql = query.ToSql().Replace("\r\n", "");
 			Assert.Equal("SELECT a.\"Id\", a.\"Clicks\", a.\"TypeGuid\", a.\"Title\", a.\"CreateTime\" FROM \"tb_topic22\" a", sql);
-			query.ToList();
+			query.First();
 
 			query = select.WhereIf(false, a => a.Type.Parent.Name == "tparent");
 			sql = query.ToSql().Replace("\r\n", "");
 			Assert.Equal("SELECT a.\"Id\", a.\"Clicks\", a.\"TypeGuid\", a.\"Title\", a.\"CreateTime\" FROM \"tb_topic22\" a", sql);
-			query.ToList();
+			query.First();
 
 			//����һ�� From ��Ķ������
 			query2 = select.From<TestTypeInfo, TestTypeParentInfo>((s, b, c) => s
@@ -522,13 +522,13 @@ namespace FreeSql.Tests.Sqlite {
 				.WhereIf(false, a => b.ParentId == 20));
 			sql = query2.ToSql().Replace("\r\n", "");
 			Assert.Equal("SELECT a.\"Id\", a.\"Clicks\", a.\"TypeGuid\", a.\"Title\", a.\"CreateTime\" FROM \"tb_topic22\" a, \"TestTypeInfo\" b, \"TestTypeParentInfo\" c", sql);
-			query2.ToList();
+			query2.First();
 
 			//������϶����㲻��
 			query = select.WhereIf(false, "a.\"Clicks\" > 100 and a.\"Id\" = @id", new { id = 10 });
 			sql = query.ToSql().Replace("\r\n", "");
 			Assert.Equal("SELECT a.\"Id\", a.\"Clicks\", a.\"TypeGuid\", a.\"Title\", a.\"CreateTime\" FROM \"tb_topic22\" a", sql);
-			query.ToList();
+			query.First();
 		}
 		[Fact]
 		public void WhereExists() {
diff --git a/FreeSql.Tests/UnitTest1.cs b/FreeSql.Tests/UnitTest1.cs
index e5a468c2..d6aa8ea1 100644
--- a/FreeSql.Tests/UnitTest1.cs
+++ b/FreeSql.Tests/UnitTest1.cs
@@ -270,7 +270,7 @@ namespace FreeSql.Tests {
 g.mysql.Aop.ParseExpression = (s, e) => {
 	if (e.Expression.NodeType ==  ExpressionType.Call) {
 		var callExp = e.Expression as MethodCallExpression;
-		if (callExp.Object.Type == typeof(DateTime) &&
+		if (callExp.Object?.Type == typeof(DateTime) &&
 			callExp.Method.Name == "ToString" &&
 			callExp.Arguments.Count == 1 &&
 			callExp.Arguments[0].Type == typeof(string) &&