/// <summary>
        /// Byte arrary to String
        /// </summary>
        /// <param name="bytes">byte array</param>
        /// <returns>string</returns>
        public static string BytesToString(byte[] bytes)
        {
            ASCIIEncoding enc = new System.Text.ASCIIEncoding();

            return enc.GetString(bytes);
        }

        /// <summary>
        /// String to Byte array
        /// </summary>
        /// <param name="str">string</param>
        /// <returns>byte array</returns>
        public static byte[] StringToBytes(string str)
        {
            ASCIIEncoding enc = new System.Text.ASCIIEncoding();

            return enc.GetBytes(str);
        }