diff --git a/Src/Asp.NetCore2/SqlSeverTest/Program.cs b/Src/Asp.NetCore2/SqlSeverTest/Program.cs
index 4c56d56e2..9186af82b 100644
--- a/Src/Asp.NetCore2/SqlSeverTest/Program.cs
+++ b/Src/Asp.NetCore2/SqlSeverTest/Program.cs
@@ -7,7 +7,8 @@ namespace OrmTest
     public class Program
     {
         static void Main(string[] args)
-        { 
+        {
+            UnitStringToExp.Init();
             //Each example will automatically create a table and can run independently.
             //每个例子都会自动建表 并且可以独立运行   
             _1_CodeFirst.Init();
diff --git a/Src/Asp.NetCore2/SqlSeverTest/UserTestCases/UnitTest/UnitStringToExp.cs b/Src/Asp.NetCore2/SqlSeverTest/UserTestCases/UnitTest/UnitStringToExp.cs
index 4540fb3c8..2331cddb2 100644
--- a/Src/Asp.NetCore2/SqlSeverTest/UserTestCases/UnitTest/UnitStringToExp.cs
+++ b/Src/Asp.NetCore2/SqlSeverTest/UserTestCases/UnitTest/UnitStringToExp.cs
@@ -56,6 +56,15 @@ namespace OrmTest
                                    " it.Name as Name" }
              , 10)
              .ToListAsync().GetAwaiter().GetResult();
+
+            var userInfo5 = db.Queryable<Order>()
+               .Select("it",
+                new List<string>()
+                { "it.Id as userId",
+                                            " {0} as id",
+                                           " it.Name as Name" }
+               , 10)
+               .InSingleAsync(1).GetAwaiter().GetResult();
         }
 
         private static void Test03()
diff --git a/Src/Asp.NetCore2/SqlSugar/Abstract/DeleteProvider/DeleteNavMethodInfo.cs b/Src/Asp.NetCore2/SqlSugar/Abstract/DeleteProvider/DeleteNavMethodInfo.cs
index eb8989421..9e4611321 100644
--- a/Src/Asp.NetCore2/SqlSugar/Abstract/DeleteProvider/DeleteNavMethodInfo.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Abstract/DeleteProvider/DeleteNavMethodInfo.cs
@@ -11,7 +11,7 @@ namespace SqlSugar
         internal object MethodInfos { get; set; }
         internal SqlSugarProvider Context { get; set; }
 
-        public DeleteNavMethodInfo IncludeByNameString(string navMemberName, DeleteNavOptions updateNavOptions = null)
+        public DeleteNavMethodInfo IncludeByNameString(string navMemberName, DeleteNavOptions deleteNavOptions = null)
         {
             var type = MethodInfos.GetType().GetGenericArguments()[0];
             var entityInfo = this.Context.EntityMaintenance.GetEntityInfo(type);
@@ -20,11 +20,11 @@ namespace SqlSugar
             Expression exp = UtilMethods.GetIncludeExpression(navMemberName, entityInfo, out properyItemType, out isList);
             var method = this.MethodInfos.GetType().GetMyMethod("Include", 2, isList)
                             .MakeGenericMethod(properyItemType);
-            var obj = method.Invoke(this.MethodInfos, new object[] { exp, updateNavOptions });
+            var obj = method.Invoke(this.MethodInfos, new object[] { exp, deleteNavOptions });
             this.MethodInfos = obj;
             return this;
         }
-        public DeleteNavMethodInfo ThenIncludeByNameString(string navMemberName, DeleteNavOptions updateNavOptions = null)
+        public DeleteNavMethodInfo ThenIncludeByNameString(string navMemberName, DeleteNavOptions deleteNavOptions = null)
         {
             var type = MethodInfos.GetType().GetGenericArguments()[1];
             var entityInfo = this.Context.EntityMaintenance.GetEntityInfo(type);
@@ -33,7 +33,7 @@ namespace SqlSugar
             Expression exp = UtilMethods.GetIncludeExpression(navMemberName, entityInfo, out properyItemType, out isList);
             var method = this.MethodInfos.GetType().GetMyMethod("ThenInclude", 2, isList)
                             .MakeGenericMethod(properyItemType);
-            var obj = method.Invoke(this.MethodInfos, new object[] { exp, updateNavOptions });
+            var obj = method.Invoke(this.MethodInfos, new object[] { exp, deleteNavOptions });
             this.MethodInfos = obj;
             return this;
         }
diff --git a/Src/Asp.NetCore2/SqlSugar/Entities/DynamicSelectModel.cs b/Src/Asp.NetCore2/SqlSugar/Entities/DynamicSelectModel.cs
index 2603f727c..ac47b7ba4 100644
--- a/Src/Asp.NetCore2/SqlSugar/Entities/DynamicSelectModel.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Entities/DynamicSelectModel.cs
@@ -10,6 +10,39 @@ namespace SqlSugar
     public class DynamicCoreSelectModel
     {
         public object Value { get; set; }
+        public object InSingle(object value)
+        {
+            if (Value is null)
+            {
+                throw new InvalidOperationException("Value cannot be null.");
+            }
+
+            var method = Value.GetType().GetMyMethod("InSingle", 1);
+            if (method == null)
+            {
+                throw new InvalidOperationException("The Value object does not have an InSingle method with one parameter.");
+            }
+
+            return method.Invoke(Value, new object[] { value });
+        }
+
+        public async Task<object> InSingleAsync(object value)
+        {
+            if (Value is null)
+            {
+                throw new InvalidOperationException("Value cannot be null.");
+            }
+
+            var method = Value.GetType().GetMyMethod("InSingleAsync", 1);
+            if (method == null)
+            {
+                throw new InvalidOperationException("The Value object does not have an InSingleAsync method with one parameter.");
+            }
+
+            var task = (Task)method.Invoke(Value, new object[] { value });
+            return await GetTask(task).ConfigureAwait(false);
+        }
+
 
         public object ToList()
         {