diff --git a/websocket-sharp/Ext.cs b/websocket-sharp/Ext.cs
index cbb954ab..2dccd4d7 100644
--- a/websocket-sharp/Ext.cs
+++ b/websocket-sharp/Ext.cs
@@ -70,12 +70,6 @@ namespace WebSocketSharp
 
     #endregion
 
-    #region Internal Fields
-
-    internal static readonly byte[] EmptyByteArray = new byte[0];
-
-    #endregion
-
     #region Private Methods
 
     private static byte[] compress (this byte[] data)
@@ -608,13 +602,13 @@ namespace WebSocketSharp
             try {
               var len = stream.EndRead (ar);
               bytes = len < 1
-                      ? EmptyByteArray
+                      ? WebSocket.EmptyBytes
                       : len < length
                         ? stream.readBytes (buff, len, length - len)
                         : buff;
             }
             catch {
-              bytes = EmptyByteArray;
+              bytes = WebSocket.EmptyBytes;
             }
 
             if (completed != null)
@@ -1601,7 +1595,7 @@ namespace WebSocketSharp
                                     ? BitConverter.GetBytes ((UInt32)(object) value)
                                     : type == typeof (UInt64)
                                       ? BitConverter.GetBytes ((UInt64)(object) value)
-                                      : EmptyByteArray;
+                                      : WebSocket.EmptyBytes;
 
       if (bytes.Length > 1 && !order.IsHostOrder ())
         Array.Reverse (bytes);
diff --git a/websocket-sharp/PayloadData.cs b/websocket-sharp/PayloadData.cs
index e7d7bcda..d6991364 100644
--- a/websocket-sharp/PayloadData.cs
+++ b/websocket-sharp/PayloadData.cs
@@ -54,7 +54,7 @@ namespace WebSocketSharp
 
     internal PayloadData ()
     {
-      _data = Ext.EmptyByteArray;
+      _data = WebSocket.EmptyBytes;
     }
 
     internal PayloadData (byte[] data)
@@ -105,7 +105,7 @@ namespace WebSocketSharp
       get {
         return _extDataLength > 0
                ? _data.SubArray (0, _extDataLength)
-               : Ext.EmptyByteArray;
+               : WebSocket.EmptyBytes;
       }
     }
 
diff --git a/websocket-sharp/WebSocket.cs b/websocket-sharp/WebSocket.cs
index 7a591ffc..3e38ff02 100644
--- a/websocket-sharp/WebSocket.cs
+++ b/websocket-sharp/WebSocket.cs
@@ -114,6 +114,11 @@ namespace WebSocketSharp
 
     #region Internal Fields
 
+    /// <summary>
+    /// Represents the empty array of <see cref="byte"/> used internally.
+    /// </summary>
+    internal static readonly byte[] EmptyBytes = new byte[0];
+
     /// <summary>
     /// Represents the length used to determine whether the data should be fragmented in sending.
     /// </summary>
@@ -1219,7 +1224,7 @@ namespace WebSocketSharp
       /* Not fragmented */
 
       if (len == 0)
-        return send (Fin.Final, opcode, new byte[0], compressed);
+        return send (Fin.Final, opcode, EmptyBytes, compressed);
 
       var quo = len / FragmentLength;
       var rem = (int) (len % FragmentLength);
diff --git a/websocket-sharp/WebSocketFrame.cs b/websocket-sharp/WebSocketFrame.cs
index 427bb597..3a4b45a0 100644
--- a/websocket-sharp/WebSocketFrame.cs
+++ b/websocket-sharp/WebSocketFrame.cs
@@ -98,7 +98,7 @@ namespace WebSocketSharp
       var len = payloadData.Length;
       if (len < 126) {
         _payloadLength = (byte) len;
-        _extPayloadLength = Ext.EmptyByteArray;
+        _extPayloadLength = WebSocket.EmptyBytes;
       }
       else if (len < 0x010000) {
         _payloadLength = (byte) 126;
@@ -116,7 +116,7 @@ namespace WebSocketSharp
       }
       else {
         _mask = Mask.Unmask;
-        _maskingKey = Ext.EmptyByteArray;
+        _maskingKey = WebSocket.EmptyBytes;
       }
 
       _payloadData = payloadData;
@@ -461,7 +461,7 @@ Extended Payload Length: {7}
       /* Extended Payload Length */
 
       var size = payloadLen < 126 ? 0 : (payloadLen == 126 ? 2 : 8);
-      var extPayloadLen = size > 0 ? stream.ReadBytes (size) : Ext.EmptyByteArray;
+      var extPayloadLen = size > 0 ? stream.ReadBytes (size) : WebSocket.EmptyBytes;
       if (size > 0 && extPayloadLen.Length != size)
         throw new WebSocketException (
           "The 'Extended Payload Length' of a frame cannot be read from the data source.");
@@ -471,7 +471,7 @@ Extended Payload Length: {7}
       /* Masking Key */
 
       var masked = mask == Mask.Mask;
-      var maskingKey = masked ? stream.ReadBytes (4) : Ext.EmptyByteArray;
+      var maskingKey = masked ? stream.ReadBytes (4) : WebSocket.EmptyBytes;
       if (masked && maskingKey.Length != 4)
         throw new WebSocketException (
           "The 'Masking Key' of a frame cannot be read from the data source.");
@@ -503,7 +503,7 @@ Extended Payload Length: {7}
             "The 'Payload Data' of a frame cannot be read from the data source.");
       }
       else {
-        data = Ext.EmptyByteArray;
+        data = WebSocket.EmptyBytes;
       }
 
       frame._payloadData = new PayloadData (data, masked);
@@ -577,7 +577,7 @@ Extended Payload Length: {7}
 
       _mask = Mask.Unmask;
       _payloadData.Mask (_maskingKey);
-      _maskingKey = Ext.EmptyByteArray;
+      _maskingKey = WebSocket.EmptyBytes;
     }
 
     #endregion