Add demo

Src/Asp.NetCore2/SqlSeverTest/UserTestCases/UnitTest/UnitStringToExp.cs

@@ -4,6 +4,7 @@ using System.Collections.Generic;
 using System.Linq.Dynamic.Core;
 using System.Linq.Dynamic.Core.CustomTypeProviders;
 using System.Text;
+using static OrmTest.UnitOneToManyFiltersadfa;
 
 namespace OrmTest
 {
@@ -128,8 +129,24 @@ namespace OrmTest
                 .Where("it", $"SqlFunc.Exists(it.Address.Id)")
                 .OrderBy((it, y) => it.Id)
                 .ToList();
-
-             
+            //Select实现返回导航属性
+            var list66 = db.Queryable<UnitPerson011>()
+                 .Includes(it => it.Address)
+            .Select(it => new
+                 {
+                     addid=it.Address.Id,
+                     Address =it.Address
+                 }).ToList();
+            var list666 = db.Queryable<UnitPerson011>()
+                     .Includes(it=>it.Address)
+                     .Select("it",
+                      new List<string>()
+                      {  
+                            " it.Address.Id as addid" ,
+                            "it.Address as Address"
+                          }
+                       )
+                     .ToList();  
             var xxx = DynamicCoreHelper.GetMember(typeof(UnitPerson011), typeof(int), "it", $"it.Address.Id ");
             var list7= db.Queryable<UnitPerson011>().Select<int>("it", $"it.Address.Id ",typeof(UnitPerson011), typeof(int)).ToList();
             var list8 = db.Queryable<Order>().Select("it", $"new(it.Id as Id, it.Name)", typeof(Order)).ToList();