MessageWrapper.cs

        public static void SetFieldValue(MessageWrapper message, string fieldName, object fieldValue)
        {
            if (message != null)
            {
                if (message.FixMessage != null)
                {
                    QFReflector.SetFieldValue(message.FixMessage, fieldName, fieldValue);
                }
                else
                {
                    OFReflector.SetFieldValue(message.FastMessage, fieldName, fieldValue);
                }
            }
        }