private static void ValueChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            RatingControl control = (d as RatingControl);

            if (control._isLoaded)
            {
                control.RefreshRateValues();
            }
        }
 private static void RoundValueSlicePropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
 {
     if (e.OldValue != e.NewValue)
     {
         RatingControl control = (d as RatingControl);
         control.Value = control.RoundSliced((double)e.NewValue);
         control.RefreshRateValues();
     }
 }