diff --git a/Src/Asp.Net/SqlServerTest/Demos/1_Query.cs b/Src/Asp.Net/SqlServerTest/Demos/1_Query.cs
index 5197e70d3..4cdc7497b 100644
--- a/Src/Asp.Net/SqlServerTest/Demos/1_Query.cs
+++ b/Src/Asp.Net/SqlServerTest/Demos/1_Query.cs
@@ -164,7 +164,7 @@ namespace OrmTest.Demo
             var getFirstOrDefault = db.Queryable<Student>().First();
             var getByWhere = db.Queryable<Student>().Where(it => it.Id == 1 || it.Name == "a").ToList();
             var getByFuns = db.Queryable<Student>().Where(it => SqlFunc.IsNullOrEmpty(it.Name)).ToList();
-            var sum = db.Queryable<Student>().Sum(it => it.Id);
+            var sum = db.Queryable<Student>().Select(it => it.SchoolId).ToList();
             var sum2 = db.Queryable<Student,School>((st,sc)=>st.SchoolId==sc.Id).Sum((st,sc) => sc.Id);
             var isAny = db.Queryable<Student>().Where(it => it.Id == -1).Any();
             var isAny2 = db.Queryable<Student>().Any(it => it.Id == -1);
diff --git a/Src/Asp.Net/SqlSugar/Abstract/DbBindProvider/DbBindAccessory.cs b/Src/Asp.Net/SqlSugar/Abstract/DbBindProvider/DbBindAccessory.cs
index 22300c3c8..6cb1a8bd4 100644
--- a/Src/Asp.Net/SqlSugar/Abstract/DbBindProvider/DbBindAccessory.cs
+++ b/Src/Asp.Net/SqlSugar/Abstract/DbBindProvider/DbBindAccessory.cs
@@ -135,7 +135,7 @@ namespace SqlSugar
                     }
                     else
                     {
-                        reval.Add((T)Convert.ChangeType(re.GetValue(0), type));
+                        reval.Add((T)Convert.ChangeType(re.GetValue(0),PubMethod.GetUnderType(type)));
                     }
                 }
             }
diff --git a/Src/Asp.Net/SqlSugar/Properties/AssemblyInfo.cs b/Src/Asp.Net/SqlSugar/Properties/AssemblyInfo.cs
index bd60abd3d..6525a91bd 100644
--- a/Src/Asp.Net/SqlSugar/Properties/AssemblyInfo.cs
+++ b/Src/Asp.Net/SqlSugar/Properties/AssemblyInfo.cs
@@ -31,5 +31,5 @@ using System.Runtime.InteropServices;
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("4.2.1.5")]
-[assembly: AssemblyFileVersion("4.2.1.5")]
+[assembly: AssemblyVersion("4.2.1.6")]
+[assembly: AssemblyFileVersion("4.2.1.6")]