protected virtual void OnCurrentPairChanged(CurrentPairChangedEventArgs e)
 {
     if (CurrentPairChanged != null)
     {
         CurrentPairChanged(this, e);
     }
 }
        private CurrentPairChangedEventArgs OnCurrentPairChangedForOut()
        {
            CurrentPairChangedEventArgs args = new CurrentPairChangedEventArgs();

            OnCurrentPairChanged(args);

            return(args);
        }