protected virtual void OnCommandErrorDataReceived(CommandOutputEventArgs e)
        {
            var handler = CommandErrorDataReceived;

            if (handler != null)
            {
                handler(this, e);
            }
        }
 protected virtual void OnCommandErrorDataReceived(CommandOutputEventArgs e)
 {
     var handler = CommandErrorDataReceived;
     if (handler != null) handler(this, e);
 }