public string ToString(List <string> excludeKeys) { if (excludeKeys == null || excludeKeys.Count == 0) { return(ToString()); } var dict = new Dictionary <string, object>(StringComparer.OrdinalIgnoreCase); foreach (var key in _dataDict.Keys) { if (!FormUtils.ContainsIgnoreCase(excludeKeys, key)) { dict[key] = _dataDict[key]; } } return(FormUtils.JsonSerialize(dict)); }