NFrame.NFGUID.IsNull C# (CSharp) Method

        public bool IsNull()
        {
            return 0 == nData64 && 0 == nHead64;
        }

        private void EGMI_ACK_OBJECT_PROPERTY_ENTRY(int id, MemoryStream stream)
        {
            NFMsg.MsgBase xMsg = NFMsg.MsgBase.Parser.ParseFrom(stream);

            NFMsg.MultiObjectPropertyList xData = NFMsg.MultiObjectPropertyList.Parser.ParseFrom(xMsg.MsgData);

            for (int i = 0; i < xData.MultiPlayerProperty.Count; i++)
            {
                NFMsg.ObjectPropertyList xPropertyData = xData.MultiPlayerProperty[i];
                NFGUID xObjectID = mHelpModule.PBToNF(xPropertyData.PlayerId);

                ObjectDataBuff xDataBuff;
                if (mxObjectDataBuff.TryGetValue(xObjectID, out xDataBuff))
                {
                    xDataBuff.xPropertyList = xPropertyData;
                    if (xObjectID.IsNull())
                    {
                        AttachObjectData(xObjectID);
                    }
                }
                else
                {
                    xDataBuff = new ObjectDataBuff();
                    xDataBuff.xPropertyList     = xPropertyData;
                    mxObjectDataBuff[xObjectID] = xDataBuff;
                    AttachObjectData(xObjectID);
                }
            }
        }