SectionInformation.ProtectSection Method

static public void ProtectSection()
{

    // Get the current configuration file.
    System.Configuration.Configuration config =
            ConfigurationManager.OpenExeConfiguration(
            ConfigurationUserLevel.None);


    // Get the section.
    UrlsSection section =
        (UrlsSection)config.GetSection("MyUrls");


    // Protect (encrypt)the section.
    section.SectionInformation.ProtectSection(
        "RsaProtectedConfigurationProvider");

    // Save the encrypted section.
    section.SectionInformation.ForceSave = true;

    config.Save(ConfigurationSaveMode.Full);

    // Display decrypted configuration 
    // section. Note, the system
    // uses the Rsa provider to decrypt
    // the section transparently.
    string sectionXml =
        section.SectionInformation.GetRawXml();

    Console.WriteLine("Decrypted section:");
    Console.WriteLine(sectionXml);

}