[Modify] Replace it

websocket-sharp/WebSocketFrame.cs

@@ -595,7 +595,7 @@ Extended Payload Length: {7}
     {
       var len = frame.FullPayloadLength;
       if (len == 0) {
-        frame._payloadData = new PayloadData ();
+        frame._payloadData = PayloadData.Empty;
         return frame;
       }
 
@@ -626,7 +626,7 @@ Extended Payload Length: {7}
     {
       var len = frame.FullPayloadLength;
       if (len == 0) {
-        frame._payloadData = new PayloadData ();
+        frame._payloadData = PayloadData.Empty;
         completed (frame);
 
         return;
@@ -667,7 +667,7 @@ Extended Payload Length: {7}
 
     internal static WebSocketFrame CreatePingFrame (bool mask)
     {
-      return new WebSocketFrame (Fin.Final, Opcode.Ping, new PayloadData (), false, mask);
+      return new WebSocketFrame (Fin.Final, Opcode.Ping, PayloadData.Empty, false, mask);
     }
 
     internal static WebSocketFrame CreatePingFrame (byte[] data, bool mask)