public override String ToFormulaString(){String value = field_3_string;int len = value.Length;StringBuilder sb = new StringBuilder(len + 4);sb.Append(FORMULA_DELIMITER);for (int i = 0; i < len; i++){char c = value[i];if (c == FORMULA_DELIMITER){sb.Append(FORMULA_DELIMITER);}sb.Append(c);}sb.Append(FORMULA_DELIMITER);return sb.ToString();}