namespace System.Collections.Concurrent
{
    [ComVisible(false)]
    [DebuggerDisplay("Count = {Count}")]
    [DebuggerTypeProxy(typeof(Mscorlib_DictionaryDebugView<?, ?>))]
    [DefaultMember("Item")]
    public class ConcurrentDictionary<TKey, TValue> : ICollection<KeyValuePair<TKey, TValue>>, IDictionary<TKey, TValue>, IEnumerable, IEnumerable<KeyValuePair<TKey, TValue>>, IReadOnlyCollection<KeyValuePair<TKey, TValue>>, IReadOnlyDictionary<TKey, TValue>, ICollection, IDictionary
    {
        public ConcurrentDictionary(int concurrencyLevel, IEnumerable<KeyValuePair<TKey, TValue>> collection, IEqualityComparer<TKey> comparer);
    }
}