namespace System.Collections.Immutable
{
    [DebuggerDisplay("Count = {Count}")]
    [DebuggerTypeProxy(typeof(ImmutableDictionaryDebuggerProxy<?, ?>))]
    [DefaultMember("Item")]
    public sealed class ImmutableSortedDictionary<TKey, TValue> : ICollection<KeyValuePair<TKey, TValue>>, IDictionary<TKey, TValue>, IEnumerable<KeyValuePair<TKey, TValue>>, IReadOnlyCollection<KeyValuePair<TKey, TValue>>, IReadOnlyDictionary<TKey, TValue>, ICollection, IDictionary, IEnumerable, IImmutableDictionary<TKey, TValue>
        where TKey, notnull
    {
        [EditorBrowsable(EditorBrowsableState.Advanced)]
        public struct Enumerator : IEnumerator, IEnumerator<KeyValuePair<TKey, TValue>>, IDisposable
        {
            public bool MoveNext();
        }
    }
}