namespace System.Json
{
    [DefaultMember("Item")]
    public class JsonObject : JsonValue, ICollection<KeyValuePair<string, JsonValue>>, IDictionary<string, JsonValue>, IEnumerable, IEnumerable<KeyValuePair<string, JsonValue>>
    {
        public void AddRange(IEnumerable<KeyValuePair<string, JsonValue>> items);
    }
}