System.Configuration.AppSettingsSection.EnsureStaticPropertyBag C# (CSharp) Метод

        private static ConfigurationPropertyCollection EnsureStaticPropertyBag() {
            if (s_properties == null) {
                s_propAppSettings = new ConfigurationProperty(null, typeof(KeyValueConfigurationCollection), null, ConfigurationPropertyOptions.IsDefaultCollection);
                s_propFile = new ConfigurationProperty("file", typeof(string), String.Empty, ConfigurationPropertyOptions.None);

                ConfigurationPropertyCollection properties = new ConfigurationPropertyCollection();
                properties.Add(s_propAppSettings);
                properties.Add(s_propFile);
                s_properties = properties;
            }

            return s_properties;
        }