Move Module property to an extension method.

framework/src/Volo.Abp.AspNetCore.Mvc.Contracts/Volo/Abp/AspNetCore/Mvc/ApplicationConfigurations/ObjectExtending/CachedObjectExtensionsDtoService.cs

@@ -37,7 +37,7 @@ namespace Volo.Abp.AspNetCore.Mvc.ApplicationConfigurations.ObjectExtending
                 Modules = new Dictionary<string, ModuleExtensionDto>()
             };
 
-            foreach (var moduleConfig in ObjectExtensionManager.Instance.Modules)
+            foreach (var moduleConfig in ObjectExtensionManager.Instance.Modules())
             {
                 var moduleExtensionDto = objectExtensionsDto.Modules[moduleConfig.Key] = new ModuleExtensionDto
                 {

framework/src/Volo.Abp.ObjectExtending/Volo/Abp/ObjectExtending/Modularity/ModuleObjectExtensionConfigurationHelper.cs

@@ -122,7 +122,7 @@ namespace Volo.Abp.ObjectExtending.Modularity
             string moduleName,
             string objectName)
         {
-            var moduleConfig = ObjectExtensionManager.Instance.Modules.GetOrDefault(moduleName);
+            var moduleConfig = ObjectExtensionManager.Instance.Modules().GetOrDefault(moduleName);
             if (moduleConfig == null)
             {
                 return Array.Empty<ModuleEntityObjectPropertyExtensionConfiguration>();

framework/src/Volo.Abp.ObjectExtending/Volo/Abp/ObjectExtending/ModuleObjectExtensionManagerExtensions.cs

@@ -0,0 +1,22 @@
+using System.Collections.Generic;
+using JetBrains.Annotations;
+using Volo.Abp.ObjectExtending.Modularity;
+
+namespace Volo.Abp.ObjectExtending
+{
+    public static class ModuleObjectExtensionManagerExtensions
+    {
+        private const string ObjectExtensionManagerConfigurationKey = "_Modules";
+
+        public static ModuleObjectExtensionConfigurationDictionary Modules(
+            [NotNull]this ObjectExtensionManager objectExtensionManager)
+        {
+            Check.NotNull(objectExtensionManager, nameof(objectExtensionManager));
+
+            return objectExtensionManager.Configuration.GetOrAdd(
+                ObjectExtensionManagerConfigurationKey,
+                () => new ModuleObjectExtensionConfigurationDictionary()
+            ) as ModuleObjectExtensionConfigurationDictionary;
+        }
+    }
+}

framework/src/Volo.Abp.ObjectExtending/Volo/Abp/ObjectExtending/ObjectExtensionManager.cs

@@ -3,7 +3,6 @@ using System.Collections.Generic;
 using System.Collections.Immutable;
 using JetBrains.Annotations;
 using Volo.Abp.Data;
-using Volo.Abp.ObjectExtending.Modularity;
 
 namespace Volo.Abp.ObjectExtending
 {
@@ -16,13 +15,10 @@ namespace Volo.Abp.ObjectExtending
 
         protected Dictionary<Type, ObjectExtensionInfo> ObjectsExtensions { get; }
         
-        public ModuleObjectExtensionConfigurationDictionary Modules { get; }
-
         protected internal ObjectExtensionManager()
         {
             ObjectsExtensions = new Dictionary<Type, ObjectExtensionInfo>();
             Configuration = new Dictionary<object, object>();
-            Modules = new ModuleObjectExtensionConfigurationDictionary();
         }
 
         [NotNull]