public Item(ItemId itemId, int count) { _itemId = itemId; _count = count; }
public bool Contains(ItemId itemId) { return(_items.Exists(_ => _.ItemId == itemId)); }
public Item Get(ItemId itemId) { return(_items.Find(_ => _.ItemId == itemId)); }
public void Remove(ItemId itemId) { _items.Remove(_items.Find(_ => _.ItemId == itemId)); }