Appboy.Models.Cards.Card.Card C# (CSharp) Method

        public Card(JSONClass json)
        {
            if (json == null) {
            throw new ArgumentNullException("json");
              }
              JsonString = json.ToString();
              if (json["id"] == null || json["type"] == null || json["viewed"] == null || json["created"] == null || json["updated"] == null) {
            throw new ArgumentException("Missing required field(s).");
              }
              ID = json["id"];
              Type = json["type"];
              Viewed = json["viewed"].AsBool;
              Created = json["created"].AsInt;
              Updated = json["updated"].AsInt;
              if (json["extras"] != null) {
            Extras = JsonUtils.JSONClassToDictionary(json["extras"].AsObject);
              }
              Categories = new HashSet<CardCategory>();
              if (json["categories"] == null) {
            Categories.Add(CardCategory.NO_CATEGORY);
              } else {
            JSONArray jsonArray = (JSONArray)JSON.Parse(json["categories"].ToString());
            if (jsonArray == null || jsonArray.Count == 0) {
              Categories.Add(CardCategory.NO_CATEGORY);
            } else {
              for (int i = 0; i < jsonArray.Count; i++) {
            CardCategory category = (CardCategory)EnumUtils.TryParse(typeof(CardCategory), jsonArray[i], true, null);
            if (category != null) {
              Categories.Add(category);
            }
              }
            }
              }
        }