diff --git a/Assets/Scripts/GameClient.cs b/Assets/Scripts/GameClient.cs
index 737e671..080b344 100644
--- a/Assets/Scripts/GameClient.cs
+++ b/Assets/Scripts/GameClient.cs
@@ -21,7 +21,7 @@ public class GameClient : MonoBehaviour
 
     private KcpDofClient _kcpDofClient;
     private string levelId;
-    private List<string> _levelIds = new List<string>();
+    private List<string> _levelIds = new ();
     private int _levelIndex;
     private int _pointId;
 
diff --git a/Assets/Scripts/KcpDofClient.cs b/Assets/Scripts/KcpDofClient.cs
index 3f0196b..0b105a6 100644
--- a/Assets/Scripts/KcpDofClient.cs
+++ b/Assets/Scripts/KcpDofClient.cs
@@ -14,8 +14,7 @@ public class KcpDofClient : KcpListener
 
     private Ukcp _ukcp;
     private KcpClient _kcpClient;
-    private MemoryStream _localRecvMs = new MemoryStream(1024 * 1024 * 1);
-    private MemoryStream _localSendMs = new MemoryStream(1024 * 1024 * 1);
+    private MemoryStream _localSendMs = new (1024 * 1024 * 1);
 
     public long Cid { get; private set; }
 
@@ -90,11 +89,10 @@ public class KcpDofClient : KcpListener
     {
         Debug.Log("[KcpDofClient]handleReceive");
 
-        _localRecvMs.SetLength(0);
-        _localRecvMs.Position = 0;
+        var ms = new MemoryStream(1024 * 1024 * 1);
         var data_len = byteBuf.ReadableBytes;
-        byteBuf.ReadBytes(_localRecvMs, data_len);
-        var msg = ProtobufHelper.FromBytes(typeof(ServerMessage), _localRecvMs.GetBuffer(), 0, data_len);
+        byteBuf.ReadBytes(ms, data_len);
+        var msg = ProtobufHelper.FromBytes(typeof(ServerMessage), ms.GetBuffer(), 0, data_len);
         var server_msg = msg as ServerMessage;
 
         if (server_msg != null)