public void AddItem(GalleryItem item)
{
if (item == null)
{
throw new ArgumentNullException(nameof(item));
}
if (_galleryItems.Contains(item))
{
return;
}
_galleryItems.Add(item);
item.SetGallery(this);
}
public void RemoveItem(GalleryItem item)
{
if (item == null)
{
throw new ArgumentNullException(nameof(item));
}
var isPresent = _galleryItems.Contains(item);
if (isPresent)
{
_galleryItems.Remove(item);
}
item.Delete();
}