public class InfoBag : ConcurrentBag<string>
{
    public IEnumerator<string> Enumerator { get; private set; }

    public InfoBag()
    {
        Enumerator = GetEnumerator();
    }

    public void AddRange(IEnumerable<string> items)
    {
        foreach (var item in items)
        {
            base.Add(item);
        }

        Enumerator = GetEnumerator();
    }

    public new void Add(string item)
    {
        base.Add(item);
        Enumerator = GetEnumerator();
    }

    public string Take()
    {
        if (!Enumerator.MoveNext())
        {
            Enumerator = GetEnumerator();
            Enumerator.MoveNext();
        }

        return Enumerator.Current;
    }
}