public void RemoveShelf(Shelf shelf)
{
var default_shelf = GetDefaultshelf();
var books_to_move = shelf.Books.ToList();
books_to_move.Apply(b => b.Shelf = default_shelf);
Shelves.Remove(shelf);
}
private void UpdateShelf(Shelf old_shelf, Shelf new_shelf)
{
if (new_shelf != old_shelf)
{
old_shelf?.Remove(this);
new_shelf.Add(this);
}
}
public Shelf AddShelf(string name)
{
var shelf = new Shelf {
Name = name
};
Shelves.Add(shelf);
return(shelf);
}