protected virtual void OnChanged(object sender, CategoryChangedEventArgs e)
 {
     if (Changed != null)
     {
         Changed(sender, e);
     }
 }
        // ---- EVENTHANDLERS ------------------------------------------------------------------------------------------

        private void CategoryRow_SelectedCategoryChanged(object sender, CategoryChangedEventArgs e)
        {
            if (_handleCategoryEvents)
            {
                UpdateCategoriesInternal(Array.IndexOf(_categoryRows, sender), e.Previous, e.Current);
                UpdateUI();
            }
        }
 protected virtual void OnChanged(object sender, CategoryChangedEventArgs e)
 {
     if (Changed != null)
         Changed(sender, e);
 }