C# Base 64 加密带=

试了几种方式后面不会带等于号，记录一下

        /// <summary>
        /// Base64编码，采用utf8编码
        /// </summary>
        /// <param name="strPath">待编码的明文</param>
        /// <returns>Base64编码后的字符串</returns>
        public static string Base64Encrypt(string strPath)
        {
            string returnData;
            Encoding encode = Encoding.UTF8;
            byte[] bytedata = encode.GetBytes(strPath);
            try
            {
                returnData = Convert.ToBase64String(bytedata, 0, bytedata.Length);
            }
            catch
            {
                returnData = strPath;
            }
            return returnData;
        }

        /// <summary>
        /// Base64解码，采用utf8编码方式解码
        /// </summary>
        /// <param name="strPath">待解码的密文</param>
        /// <returns>Base64解码的明文字符串</returns>
        public static string Base64DesEncrypt(string strPath)
        {
            string returnData;
            byte[] bpath = Convert.FromBase64String(strPath);
            try
            {
                returnData = Encoding.UTF8.GetString(bpath);
            }
            catch
            {
                returnData = strPath;
            }
            return returnData;
        }