namespace Foundation
{
    [DefaultMember("Item")]
    [Register("NSOrderedSet", true)]
    public class NSOrderedSet : NSObject, INSCoding, INSCopying, INSMutableCopying, INSSecureCoding, INativeObject, IEnumerable, IEnumerable<NSObject>, IDisposable
    {
        public NSObject this[nint idx] { get; }
    }
}