diff --git a/Realtime/Internal/Controller/LCIMMessageController.cs b/Realtime/Internal/Controller/LCIMMessageController.cs
index 1ec3524..84cb35a 100644
--- a/Realtime/Internal/Controller/LCIMMessageController.cs
+++ b/Realtime/Internal/Controller/LCIMMessageController.cs
@@ -3,7 +3,6 @@ using System.Threading.Tasks;
 using System.Collections.Generic;
 using Newtonsoft.Json;
 using Google.Protobuf;
-using LeanCloud.Storage.Internal;
 using LeanCloud.Realtime.Protocol;
 
 namespace LeanCloud.Realtime.Internal.Controller {
diff --git a/Realtime/Message/LCIMBinaryMessage.cs b/Realtime/Message/LCIMBinaryMessage.cs
index 6b590bf..d0af326 100644
--- a/Realtime/Message/LCIMBinaryMessage.cs
+++ b/Realtime/Message/LCIMBinaryMessage.cs
@@ -1,7 +1,4 @@
-using System;
-using System.Collections.Generic;
-
-namespace LeanCloud.Realtime {
+namespace LeanCloud.Realtime {
     public class LCIMBinaryMessage : LCIMMessage {
         public byte[] Data {
             get; internal set;
diff --git a/Realtime/Message/LCIMFileMessage.cs b/Realtime/Message/LCIMFileMessage.cs
index 7a4375e..c06c38e 100644
--- a/Realtime/Message/LCIMFileMessage.cs
+++ b/Realtime/Message/LCIMFileMessage.cs
@@ -37,6 +37,8 @@ namespace LeanCloud.Realtime {
             File = file;
         }
 
+        internal override int MessageType => FileMessageType;
+
         internal override Dictionary<string, object> Encode() {
             if (File == null) {
                 throw new Exception("File MUST NOT be null before sent.");
@@ -73,7 +75,5 @@ namespace LeanCloud.Realtime {
                 File.MetaData = metaData as Dictionary<string, object>;
             }
         }
-
-        internal override int MessageType => FileMessageType;
     }
 }
diff --git a/Realtime/Message/LCIMLocationMessage.cs b/Realtime/Message/LCIMLocationMessage.cs
index 848e820..ffe60c1 100644
--- a/Realtime/Message/LCIMLocationMessage.cs
+++ b/Realtime/Message/LCIMLocationMessage.cs
@@ -1,5 +1,4 @@
 using System.Collections.Generic;
-using Newtonsoft.Json;
 using LeanCloud.Storage;
 
 namespace LeanCloud.Realtime {
diff --git a/Realtime/Message/LCIMMessage.cs b/Realtime/Message/LCIMMessage.cs
index 3337dec..2c6e70a 100644
--- a/Realtime/Message/LCIMMessage.cs
+++ b/Realtime/Message/LCIMMessage.cs
@@ -1,7 +1,5 @@
 using System;
-using System.Linq;
 using System.Collections.Generic;
-using LeanCloud.Realtime.Protocol;
 
 namespace LeanCloud.Realtime {
     public abstract class LCIMMessage {
diff --git a/Realtime/Message/LCIMRecalledMessage.cs b/Realtime/Message/LCIMRecalledMessage.cs
index 45657b7..a54d243 100644
--- a/Realtime/Message/LCIMRecalledMessage.cs
+++ b/Realtime/Message/LCIMRecalledMessage.cs
@@ -1,5 +1,4 @@
-using System;
-
+
 namespace LeanCloud.Realtime {
     public class LCIMRecalledMessage {
         public LCIMRecalledMessage() {
diff --git a/Realtime/Message/LCIMTextMessage.cs b/Realtime/Message/LCIMTextMessage.cs
index bf831b3..8a8ba8c 100644
--- a/Realtime/Message/LCIMTextMessage.cs
+++ b/Realtime/Message/LCIMTextMessage.cs
@@ -21,13 +21,13 @@ namespace LeanCloud.Realtime {
             return data;
         }
 
+        internal override int MessageType => TextMessageType;
+
         protected override void DecodeMessageData(Dictionary<string, object> msgData) {
             base.DecodeMessageData(msgData);
             if (msgData.TryGetValue("_lctext", out object value)) {
                 Text = value as string;
             }
         }
-
-        internal override int MessageType => TextMessageType;
     }
 }