public ReadOnlyUniqueList(UniqueListBase <T> target)
{
if (target is null)
{
throw new ArgumentNullException(nameof(target));
}
_target = target;
}
internal protected UniqueListBase(UniqueListBase <T> other)
{
_items = new List <T>(other._items);
_flags = new List <bool>(other._flags);
_lookup = new Dictionary <T, int>(other._lookup);
Items = _items.AsReadOnly();
Lookup = new ReadOnlyDictionary <T, int>(_lookup);
Count = other.Count;
}