diff --git a/Storage/Storage/Internal/Operation/ILCOperation.cs b/Storage/Storage/Internal/Operation/ILCOperation.cs
index 1c9512d..658a2c8 100644
--- a/Storage/Storage/Internal/Operation/ILCOperation.cs
+++ b/Storage/Storage/Internal/Operation/ILCOperation.cs
@@ -1,7 +1,7 @@
 using System.Collections;
 
 namespace LeanCloud.Storage.Internal.Operation {
-    public interface ILCOperation {
+    internal interface ILCOperation {
         ILCOperation MergeWithPrevious(ILCOperation previousOp);
 
         object Encode();
diff --git a/Storage/Storage/LCCloud.cs b/Storage/Storage/LCCloud.cs
index 830d3ca..a27cc30 100644
--- a/Storage/Storage/LCCloud.cs
+++ b/Storage/Storage/LCCloud.cs
@@ -76,7 +76,7 @@ namespace LeanCloud.Storage {
 
         static object EncodeLCObject(LCObject obj) {
             obj.ApplyCustomProperties();
-            Dictionary<string, object> dict = LCObjectData.Encode(obj.Data);
+            Dictionary<string, object> dict = LCObjectData.Encode(obj.data);
             dict["__type"] = "Object";
             return dict;
         }
diff --git a/Storage/Storage/LCHookObject.cs b/Storage/Storage/LCHookObject.cs
index 5b9cc09..c764896 100644
--- a/Storage/Storage/LCHookObject.cs
+++ b/Storage/Storage/LCHookObject.cs
@@ -15,17 +15,6 @@ namespace LeanCloud.Storage {
     public partial class LCObject {
         internal const string IgnoreHooksKey = "__ignore_hooks";
 
-        internal HashSet<string> ignoreHooks;
-
-        internal HashSet<string> IgnoreHooks {
-            get {
-                if (ignoreHooks == null) {
-                    ignoreHooks = new HashSet<string>();
-                }
-                return ignoreHooks;
-            }
-        }
-
         public void DisableBeforeHook() {
             Ignore(
                 LCClassHook.BeforeSave,
diff --git a/Storage/Storage/LCObject.cs b/Storage/Storage/LCObject.cs
index 8f828e0..76ef2b1 100644
--- a/Storage/Storage/LCObject.cs
+++ b/Storage/Storage/LCObject.cs
@@ -16,9 +16,7 @@ namespace LeanCloud.Storage {
         /// <summary>
         /// Last synced data.
         /// </summary>
-        public LCObjectData Data {
-            get;
-        }
+        internal LCObjectData data;
 
         /// <summary>
         /// Estimated data.
@@ -35,25 +33,25 @@ namespace LeanCloud.Storage {
 
         public string ClassName {
             get {
-                return Data.ClassName;
+                return data.ClassName;
             }
         }
 
         public string ObjectId {
             get {
-                return Data.ObjectId;
+                return data.ObjectId;
             }
         }
 
         public DateTime CreatedAt {
             get {
-                return Data.CreatedAt;
+                return data.CreatedAt;
             }
         }
 
         public DateTime UpdatedAt {
             get {
-                return Data.UpdatedAt;
+                return data.UpdatedAt;
             }
         }
 
@@ -77,11 +75,11 @@ namespace LeanCloud.Storage {
             if (string.IsNullOrEmpty(className)) {
                 throw new ArgumentNullException(nameof(className));
             }
-            Data = new LCObjectData();
+            data = new LCObjectData();
             estimatedData = new Dictionary<string, object>();
             operationDict = new Dictionary<string, ILCOperation>();
 
-            Data.ClassName = className;
+            data.ClassName = className;
             isNew = true;
         }
 
@@ -90,7 +88,7 @@ namespace LeanCloud.Storage {
                 throw new ArgumentNullException(nameof(objectId));
             }
             LCObject obj = Create(className);
-            obj.Data.ObjectId = objectId;
+            obj.data.ObjectId = objectId;
             obj.isNew = false;
             return obj;
         }
@@ -456,7 +454,7 @@ namespace LeanCloud.Storage {
         /// </summary>
         /// <returns></returns>
         public override string ToString() {
-            Dictionary<string, object> originalData = LCObjectData.Encode(Data);
+            Dictionary<string, object> originalData = LCObjectData.Encode(data);
             Dictionary<string, object> currentData = estimatedData.Union(originalData.Where(kv => !estimatedData.ContainsKey(kv.Key)))
                 .ToDictionary(k => k.Key, v => v.Value);
             return JsonConvert.SerializeObject(currentData);
@@ -492,17 +490,17 @@ namespace LeanCloud.Storage {
         }
 
         public void Merge(LCObjectData objectData) {
-            Data.ClassName = objectData.ClassName ?? Data.ClassName;
-            Data.ObjectId = objectData.ObjectId ?? Data.ObjectId;
-            Data.CreatedAt = objectData.CreatedAt != null ? objectData.CreatedAt : Data.CreatedAt;
-            Data.UpdatedAt = objectData.UpdatedAt != null ? objectData.UpdatedAt : Data.UpdatedAt;
+            data.ClassName = objectData.ClassName ?? data.ClassName;
+            data.ObjectId = objectData.ObjectId ?? data.ObjectId;
+            data.CreatedAt = objectData.CreatedAt != null ? objectData.CreatedAt : data.CreatedAt;
+            data.UpdatedAt = objectData.UpdatedAt != null ? objectData.UpdatedAt : data.UpdatedAt;
             // 先将本地的预估数据直接替换
             ApplyCustomProperties();
             // 再将服务端的数据覆盖
             foreach (KeyValuePair<string, object> kv in objectData.CustomPropertyDict) {
                 string key = kv.Key;
                 object value = kv.Value;
-                Data.CustomPropertyDict[key] = value;
+                data.CustomPropertyDict[key] = value;
             }
 
             // 最后重新生成预估数据，用于后续访问和操作
@@ -513,12 +511,12 @@ namespace LeanCloud.Storage {
         }
 
         public void ApplyCustomProperties() {
-            Data.CustomPropertyDict = estimatedData;
+            data.CustomPropertyDict = estimatedData;
         }
 
         void RebuildEstimatedData() {
             estimatedData = new Dictionary<string, object>();
-            foreach (KeyValuePair<string, object> kv in Data.CustomPropertyDict) {
+            foreach (KeyValuePair<string, object> kv in data.CustomPropertyDict) {
                 string key = kv.Key;
                 object value = kv.Value;
                 if (value is IList list) {