private void OnItemChanged(ItemChangedEventArgs itemChangedEventArgs)
 {
     var temp = ItemChanged;
     if (temp != null)
     {
         temp(this, itemChangedEventArgs);
     }
 }
        private void OnItemChanged(ItemChangedEventArgs itemChangedEventArgs)
        {
            var temp = ItemChanged;

            if (temp != null)
            {
                temp(this, itemChangedEventArgs);
            }
        }