/// <summary>
        /// txt に書き足す。string[ , ]を記録する
        /// </summary>
        /// <param name="textFileName"></param>
        /// <param name="writtenText"></param>
        /// <returns></returns>
        public static void WriteText(string textFileName, string[,] writtenText, bool append, string encodingName = "Shift_JIS")
        {
            string[] combined = IOTypeChange.CombineArrayToStringByComma(writtenText);

            WriteText(textFileName, combined, append, encodingName);
        }