public override string ToString()
 {
     return("TFSubscriptionActionFeedback [header=" + _header.ToString() +
            ", status=" + _status.ToString() +
            ", feedback=" + _feedback.ToString() + "]");
 }
 public override string ToString()
 {
     return("LearningRequestActionResult [header=" + _header.ToString() +
            ", status=" + _status.ToString() +
            ", result=" + _result.ToString() + "]");
 }