/// <summary>Creates a new <see cref="TrackedConcurrentQueue<T>"/> filled from the collection passed to it.</summary>
/// <param name="collection">An <see cref="IEnumerable<T>"/> that the queue will be filled from on construction.</param>
public TrackedConcurrentQueue(IEnumerable <T> collection)
: this()
{
_count = _backing.EnqueueRange(collection);
}
/// <summary>Add a sequence of items.</summary>
/// <param name="item"><see cref="IEnumerable{T}"/> of the items to add.</param>
/// <remarks>The items are added as a single atomic operation.</remarks>
public void Add(IEnumerable <T> item)
{
_backing.EnqueueRange(item);
}