EntLib 自动数据库连接字符串加密

 const string provider = "RsaProtectedConfigurationProvider";
                Configuration config = null;

                config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);

                // 加密连接字符串

                ConfigurationSection section = config.ConnectionStrings;

                if ((section.SectionInformation.IsProtected == false) &&

                    (section.ElementInformation.IsLocked == false))
                {
                    section.SectionInformation.ProtectSection(provider);

                    section.SectionInformation.ForceSave = true;

                    config.Save(ConfigurationSaveMode.Full);

                }