ConfigurationElement.LockAllAttributesExcept, propriété

// Show how to use LockAllAttributesExcept.
// It locks and unlocks all urls elements 
// except the port.
static void LockAllAttributesExcept()
{

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

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

        if (myUrlsSection == null)
            Console.WriteLine(
                "Failed to load UrlsSection.");
        else
        {

            IEnumerator elemEnum =
                 myUrlsSection.Urls.GetEnumerator();

            int i = 0;
            while (elemEnum.MoveNext())
            {

                // Get current element.
                ConfigurationElement element =
                    myUrlsSection.Urls[i];

                // Get current element lock all attributes.
                ConfigurationLockCollection lockAllAttributesExcept =
                    element.LockAllAttributesExcept;

                // Add or remove the lock on all attributes 
                // except port.
                if (lockAllAttributesExcept.Contains("port"))
                    lockAllAttributesExcept.Remove("port");
                else
                    lockAllAttributesExcept.Add("port");


                string lockedAttributes =
                    lockAllAttributesExcept.AttributeList;

                Console.WriteLine(
                    "Element {0} Locked attributes list: {1}",
                    i.ToString(), lockedAttributes);


                i += 1;

                config.Save(ConfigurationSaveMode.Full);

            }


        }
    }
    catch (ConfigurationErrorsException e)
    {
        Console.WriteLine(
            "[LockAllAttributesExcept: {0}]",
            e.ToString());
    }

}