[Modify] Rename it

websocket-sharp/Server/WebSocketServiceManager.cs

@@ -551,7 +551,7 @@ namespace WebSocketSharp.Server
         return null;
       }
 
-      return broadping (WebSocketFrame.EmptyUnmaskPingBytes, _waitTime);
+      return broadping (WebSocketFrame.EmptyPingBytes, _waitTime);
     }
 
     /// <summary>

websocket-sharp/Server/WebSocketSessionManager.cs

@@ -99,7 +99,7 @@ namespace WebSocketSharp.Server
     /// </value>
     public IEnumerable<string> ActiveIDs {
       get {
-        foreach (var res in Broadping (WebSocketFrame.EmptyUnmaskPingBytes, _waitTime))
+        foreach (var res in Broadping (WebSocketFrame.EmptyPingBytes, _waitTime))
           if (res.Value)
             yield return res.Key;
       }
@@ -144,7 +144,7 @@ namespace WebSocketSharp.Server
     /// </value>
     public IEnumerable<string> InactiveIDs {
       get {
-        foreach (var res in Broadping (WebSocketFrame.EmptyUnmaskPingBytes, _waitTime))
+        foreach (var res in Broadping (WebSocketFrame.EmptyPingBytes, _waitTime))
           if (!res.Value)
             yield return res.Key;
       }
@@ -558,7 +558,7 @@ namespace WebSocketSharp.Server
         return null;
       }
 
-      return Broadping (WebSocketFrame.EmptyUnmaskPingBytes, _waitTime);
+      return Broadping (WebSocketFrame.EmptyPingBytes, _waitTime);
     }
 
     /// <summary>

websocket-sharp/WebSocket.cs

@@ -2226,7 +2226,7 @@ namespace WebSocketSharp
     {
       var bytes = _client
                   ? WebSocketFrame.CreatePingFrame (true).ToArray ()
-                  : WebSocketFrame.EmptyUnmaskPingBytes;
+                  : WebSocketFrame.EmptyPingBytes;
 
       return Ping (bytes, _waitTime);
     }

websocket-sharp/WebSocketFrame.cs

@@ -60,7 +60,14 @@ namespace WebSocketSharp
 
     #region Internal Fields
 
-    internal static readonly byte[] EmptyUnmaskPingBytes;
+    /// <summary>
+    /// Represents the Ping frame without the payload data as an array of <see cref="byte"/>.
+    /// </summary>
+    /// <remarks>
+    /// The value of this field is created from an unmasked Ping frame, so it can only be used to
+    /// send a Ping from a server.
+    /// </remarks>
+    internal static readonly byte[] EmptyPingBytes;
 
     #endregion
 
@@ -68,7 +75,7 @@ namespace WebSocketSharp
 
     static WebSocketFrame ()
     {
-      EmptyUnmaskPingBytes = CreatePingFrame (false).ToArray ();
+      EmptyPingBytes = CreatePingFrame (false).ToArray ();
     }
 
     #endregion