AutoEncryptSettings

AutoEncryptApplicationSettings.cs

using System.Web;
using Security;

[assembly: WebActivatorEx.PostApplicationStartMethod(typeof(AutoEncryptApplicationSettings), "AutoEncrypt")]
namespace Security
{
    public class AutoEncryptApplicationSettings : AutoEncryptSettings
    {
        public static void AutoEncrypt()
        {
            if (HttpContext.Current.IsDebuggingEnabled)
                return;

            Encrypt(GetConfigurationSection("appSettings"));
        }

        public static void Decrypt()
        {
            Decrypt(GetConfigurationSection("appSettings"));
        }
    }
}

AutoEncryptConnectionStrings.cs

using System.Web;
using Security;

[assembly: WebActivatorEx.PostApplicationStartMethod(typeof(AutoEncryptConnectionStrings), "AutoEncrypt")]
namespace Security
{
    public class AutoEncryptConnectionStrings : AutoEncryptSettings
    {
        public static void AutoEncrypt()
        {
            if (HttpContext.Current.IsDebuggingEnabled)
                return;

            Encrypt(GetConfigurationSection("connectionStrings"));
        }

        public static void Decrypt()
        {
            Decrypt(GetConfigurationSection("connectionStrings"));
        }
    }
}

AutoEncryptSettings.cs

using System.Configuration;
using System.Web.Configuration;

namespace Security
{
    public abstract class AutoEncryptSettings
    {
        protected static void Encrypt(ConfigurationSection configSection)
        {
            if (configSection.SectionInformation.IsProtected)
                return;

            configSection.SectionInformation.ProtectSection("DataProtectionConfigurationProvider");
            configSection.SectionInformation.ForceSave = true;

            configSection.CurrentConfiguration.Save();
        }

        protected static void Decrypt(ConfigurationSection configSection)
        {
            if (!configSection.SectionInformation.IsProtected)
                return;

            configSection.SectionInformation.UnprotectSection();
            configSection.SectionInformation.ForceSave = true;

            configSection.CurrentConfiguration.Save();
        }

        protected static ConfigurationSection GetConfigurationSection(string section)
        {
            Configuration configuration = WebConfigurationManager.OpenWebConfiguration("~");
            var configSection = configuration.GetSection(section);

            if (configSection.ElementInformation.IsLocked || configSection.SectionInformation.IsLocked)
                return null;

            return configSection;
        }
    }
}