diff --git a/Src/Asp.NetCore2/SqlSeverTest/UserTestCases/Models/Test1dto.cs b/Src/Asp.NetCore2/SqlSeverTest/UserTestCases/Models/Test1dto.cs
new file mode 100644
index 000000000..daf87c0eb
--- /dev/null
+++ b/Src/Asp.NetCore2/SqlSeverTest/UserTestCases/Models/Test1dto.cs
@@ -0,0 +1,10 @@
+using OrmTest;
+
+namespace SqlSeverTest.UserTestCases.Models
+{
+    internal class Test1dto
+    {
+        public Unitaadfas1.Test3 Test3 { get;   set; }
+        public long Guid { get;   set; }
+    }
+}
\ No newline at end of file
diff --git a/Src/Asp.NetCore2/SqlSeverTest/UserTestCases/UnitTest/Main.cs b/Src/Asp.NetCore2/SqlSeverTest/UserTestCases/UnitTest/Main.cs
index e391837af..d8ae4294c 100644
--- a/Src/Asp.NetCore2/SqlSeverTest/UserTestCases/UnitTest/Main.cs
+++ b/Src/Asp.NetCore2/SqlSeverTest/UserTestCases/UnitTest/Main.cs
@@ -33,6 +33,7 @@ namespace OrmTest
         }
         public static void Init()
         {
+            Unitaadfas1.Init();
             Unitadfasda.Init();
             Unita3affafa.Init();
             UnitEnumTest.Init();
diff --git a/Src/Asp.NetCore2/SqlSeverTest/UserTestCases/UnitTest/Unitaadfas1.cs b/Src/Asp.NetCore2/SqlSeverTest/UserTestCases/UnitTest/Unitaadfas1.cs
new file mode 100644
index 000000000..ea38dccde
--- /dev/null
+++ b/Src/Asp.NetCore2/SqlSeverTest/UserTestCases/UnitTest/Unitaadfas1.cs
@@ -0,0 +1,89 @@
+using SqlSugar;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using SqlSeverTest.UserTestCases.Models;
+
+namespace OrmTest
+{
+    internal class Unitaadfas1
+    {
+        public static void Init() 
+        {
+            var db = NewUnitTest.Db;
+            db.CodeFirst.InitTables(typeof(Test1), typeof(Test2), typeof(Test3));
+            db.DbMaintenance.TruncateTable(typeof(Test1), typeof(Test2), typeof(Test3));
+            db.InsertNav(new Test1()
+            {
+                GuId = 1,
+                TopId = 1,
+                Test2 = new Test2()
+                {
+                    TopId = 2,
+                    GuId = 22,
+                    Test3 = new Test3()
+                    {
+                        TopId = 33,
+                        GuId = 34
+                    }
+                }
+            }).Include(x=>x.Test2).ThenInclude(x=>x.Test3).ExecuteCommand();
+            var list=db.Queryable<Test1>().Includes(x => x.Test2.Test3).ToList();
+            var list2 = db.Queryable<Test1>().Includes(x => x.Test2.Test3)
+                .Select(it=>new Test1dto
+                {
+                    Test3 = it.Test2.Test3,
+                    Guid=it.GuId
+                }).ToList();
+            if (db.Utilities.SerializeObject(list2.First().Test3) != db.Utilities.SerializeObject(list.First().Test2.Test3)) 
+            {
+                throw new Exception("unit error");
+            }
+        }
+
+        [SugarTable("UnitTest1111")]
+        public partial class Test1
+        {
+            /// <summary>
+            ///  
+            ///</summary>
+            [SugarColumn(ColumnName = "GuId", IsPrimaryKey = true, IsIdentity = true)]
+            [Column("GuId")]
+            [Key]
+            public long GuId { get; set; }
+            public long TopId { get; set; }
+            [Navigate(NavigateType.OneToOne, nameof(TopId))]
+            public Test2 Test2 { get; set; }
+
+        }
+        [SugarTable("UnitTest21111")]
+        public partial class Test2
+        {
+            /// <summary>
+            ///  
+            ///</summary>
+            [SugarColumn(ColumnName = "GuId", IsPrimaryKey = true, IsIdentity = true)]
+            [Column("GuId")]
+            [Key]
+            public long GuId { get; set; }
+            public long TopId { get; set; }
+            [Navigate(NavigateType.OneToOne, nameof(TopId))]
+            public Test3 Test3 { get; set; }
+
+        }
+        [SugarTable("UnitTest31111")]
+        public partial class Test3
+        {
+            [SugarColumn(ColumnName = "GuId", IsPrimaryKey = true, IsIdentity = true)]
+            [Column("GuId")]
+            [Key]
+            public long GuId { get; set; }
+            public long TopId { get; set; }
+
+        }
+    }
+}