diff --git a/framework/src/Volo.Abp.Ddd.Domain/Volo/Abp/Domain/Entities/Entity.cs b/framework/src/Volo.Abp.Ddd.Domain/Volo/Abp/Domain/Entities/Entity.cs
index 07e1648ab4..b78a5aa400 100644
--- a/framework/src/Volo.Abp.Ddd.Domain/Volo/Abp/Domain/Entities/Entity.cs
+++ b/framework/src/Volo.Abp.Ddd.Domain/Volo/Abp/Domain/Entities/Entity.cs
@@ -23,7 +23,7 @@ namespace Volo.Abp.Domain.Entities
     public abstract class Entity<TKey> : Entity, IEntity<TKey>
     {
         /// <inheritdoc/>
-        public virtual TKey Id { get; set; }
+        public virtual TKey Id { get; protected set; }
 
         protected Entity()
         {
diff --git a/framework/src/Volo.Abp.MemoryDb/Volo/Abp/Domain/Repositories/MemoryDb/Utf8JsonMemoryDbSerializer.cs b/framework/src/Volo.Abp.MemoryDb/Volo/Abp/Domain/Repositories/MemoryDb/Utf8JsonMemoryDbSerializer.cs
index 9964e6219b..e68b4b6f37 100644
--- a/framework/src/Volo.Abp.MemoryDb/Volo/Abp/Domain/Repositories/MemoryDb/Utf8JsonMemoryDbSerializer.cs
+++ b/framework/src/Volo.Abp.MemoryDb/Volo/Abp/Domain/Repositories/MemoryDb/Utf8JsonMemoryDbSerializer.cs
@@ -1,5 +1,8 @@
 using System;
+using System.Reflection;
 using System.Text;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Serialization;
 using Volo.Abp.DependencyInjection;
 using Volo.Abp.Json;
 
@@ -7,21 +10,43 @@ namespace Volo.Abp.Domain.Repositories.MemoryDb
 {
     public class Utf8JsonMemoryDbSerializer : IMemoryDbSerializer, ITransientDependency
     {
-        private readonly IJsonSerializer _jsonSerializer;
+        private static readonly JsonSerializerSettings MemoryDbSerializerSettings;
 
-        public Utf8JsonMemoryDbSerializer(IJsonSerializer jsonSerializer)
+        static Utf8JsonMemoryDbSerializer()
         {
-            _jsonSerializer = jsonSerializer;
+            MemoryDbSerializerSettings = new JsonSerializerSettings
+            {
+                ContractResolver = new ResolverWithPrivateSetters(),
+                ConstructorHandling = ConstructorHandling.AllowNonPublicDefaultConstructor
+            };
         }
 
         byte[] IMemoryDbSerializer.Serialize(object obj)
         {
-            return Encoding.UTF8.GetBytes(_jsonSerializer.Serialize(obj));
+            var jsonString = JsonConvert.SerializeObject(obj, MemoryDbSerializerSettings);
+            return Encoding.UTF8.GetBytes(jsonString);
         }
 
         public object Deserialize(byte[] value, Type type)
         {
-            return _jsonSerializer.Deserialize(type, Encoding.UTF8.GetString(value));
+            var jsonString = Encoding.UTF8.GetString(value);
+            return JsonConvert.DeserializeObject(jsonString, type, MemoryDbSerializerSettings);
+        }
+
+        public class ResolverWithPrivateSetters : DefaultContractResolver
+        {
+            protected override JsonProperty CreateProperty(MemberInfo member, MemberSerialization memberSerialization)
+            {
+                var prop = base.CreateProperty(member, memberSerialization);
+                if (prop.Writable)
+                {
+                    return prop;
+                }
+
+                prop.Writable = member.As<PropertyInfo>()?.GetSetMethod(true) != null;
+
+                return prop;
+            }
         }
     }
 }
\ No newline at end of file
diff --git a/framework/test/Volo.Abp.Ddd.Tests/Volo/Abp/Domain/Entities/EntityHelper_Tests.cs b/framework/test/Volo.Abp.Ddd.Tests/Volo/Abp/Domain/Entities/EntityHelper_Tests.cs
index 7207085ee6..2ad6a45b05 100644
--- a/framework/test/Volo.Abp.Ddd.Tests/Volo/Abp/Domain/Entities/EntityHelper_Tests.cs
+++ b/framework/test/Volo.Abp.Ddd.Tests/Volo/Abp/Domain/Entities/EntityHelper_Tests.cs
@@ -40,7 +40,7 @@ namespace Volo.Abp.Domain.Entities
 
         private class MyEntityImplementsIEntity : IEntity<Guid>
         {
-            public Guid Id { get; set; }
+            public Guid Id { get; protected set; }
 
             public object[] GetKeys()
             {
@@ -51,7 +51,7 @@ namespace Volo.Abp.Domain.Entities
         private class MyEntityDisablesIdGeneration : Entity<Guid>
         {
             [DisableIdGeneration]
-            public override Guid Id { get; set; }
+            public override Guid Id { get; protected set; }
         }
     }
 }