diff --git a/Src/Asp.Net/SqlServerTest/Demos/G_Mapper.cs b/Src/Asp.Net/SqlServerTest/Demos/G_Mapper.cs
index c1e83ba72..3f68d140f 100644
--- a/Src/Asp.Net/SqlServerTest/Demos/G_Mapper.cs
+++ b/Src/Asp.Net/SqlServerTest/Demos/G_Mapper.cs
@@ -22,7 +22,7 @@ namespace OrmTest.Demo
                 .Mapper((it, cache) =>
                 {
 
-                    var allSchools = cache.GetListByPrimaryKeys<School>(i => i.SchoolId);//in（ViewModelStudent3[0].SchoolId , ViewModelStudent3[1].SchoolId...）
+                    var allSchools = cache.GetListByPrimaryKeys<School>(vmodel => vmodel.SchoolId);//in（ViewModelStudent3[0].SchoolId , ViewModelStudent3[1].SchoolId...）
 
                     //Equal to the following writing.
                     //var allSchools2= cache.Get(list =>