/// <summary>

        /// utf_8转换成GB2312

        /// </summary>

        /// <param name="utfInfo"></param>

        /// <returns></returns>

        private string ToGB2312(string utfInfo)

        {

            string gb2312Info = string.Empty;

            Encoding utf8 = Encoding.UTF8;

            Encoding gb2312 = Encoding.GetEncoding("gb2312");

            byte[] unicodeBytes = utf8.GetBytes(utfInfo);

            byte[] asciiBytes = Encoding.Convert(utf8, gb2312, unicodeBytes);

            char[] asciiChars = new char[gb2312.GetCharCount(asciiBytes, 0, asciiBytes.Length)];

            gb2312.GetChars(asciiBytes, 0, asciiBytes.Length, asciiChars, 0);

            string gb2312info = new string(asciiChars);

            return gb2312info;

        }

        /// <summary>

        /// GB2312转换成UTF-8

        /// </summary>

        /// <param name="gbInfo"></param>

        /// <returns></returns>

        private string ToUTF8(string gbInfo)

        {

            string Info = string.Empty;

            Encoding gb2312 = Encoding.GetEncoding("gb2312");

            Encoding utf_8 = Encoding.GetEncoding("UTF-8");

            byte[] unicodeBytes = gb2312.GetBytes(gbInfo);

            byte[] asciiBytes = Encoding.Convert(gb2312,utf_8 , unicodeBytes);

            char[] asciiChars = new char[utf_8.GetCharCount(asciiBytes, 0, asciiBytes.Length)];

            utf_8.GetChars(asciiBytes, 0, asciiBytes.Length, asciiChars, 0);

            string info = new string(asciiChars);

            return info;

        }