Winform RsaProtectedConfigurationProvider 加密数据库连接字符串

private static string _strProvider = "RsaProtectedConfigurationProvider";

        /// <summary>
        /// 提供加密的驱动
        /// </summary>
        public string Provider
        {
            get { return _strProvider; }
            set { _strProvider = value; }
        }

        /// <summary>
        ///
        /// </summary>
        public ConfigSection() { }

        /// <summary>
        /// 加密配置文件节点
        /// </summary>
        /// <param name="strSectionName">节点名称</param>
        public static void EncryptConfigSection(string strSectionName)
        {
            Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
            ConfigurationSection section = config.GetSection(strSectionName);
            if (section != null && !section.IsReadOnly() && !section.ElementInformation.IsLocked && !section.SectionInformation.IsProtected)
            {
                section.SectionInformation.ProtectSection(_strProvider);
                section.SectionInformation.ForceSave = true;
                config.Save(ConfigurationSaveMode.Full);
                ConfigurationManager.RefreshSection(strSectionName);
            }
        }

        /// <summary>
        /// 解密配置文件节点
        /// </summary>
        /// <param name="strSectionName">节点名称</param>
        public static void DecryptConfigSection(string strSectionName)
        {
            Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
            ConfigurationSection section = config.GetSection(strSectionName);
            if (section != null && !section.IsReadOnly() && !section.ElementInformation.IsLocked && section.SectionInformation.IsProtected)
            {
                section.SectionInformation.UnprotectSection();
                section.SectionInformation.ForceSave = true;
                config.Save(ConfigurationSaveMode.Full);
                ConfigurationManager.RefreshSection(strSectionName);
            }
        }