namespace System.Collections.Concurrent
{
    [ComVisible(false)]
    [DebuggerDisplay("Count = {Count}, Type = {m_collection}")]
    [DebuggerTypeProxy(typeof(SystemThreadingCollections_BlockingCollectionDebugView<?>))]
    public class BlockingCollection<T> : IEnumerable, IEnumerable<T>, IReadOnlyCollection<T>, ICollection, IDisposable
    {
        public bool TryAdd(T item, int millisecondsTimeout, CancellationToken cancellationToken);
    }
}