namespace System.Configuration { public sealed class ClientSettingsSection : ConfigurationSection { private static readonly ConfigurationProperty s_propSettings = new ConfigurationProperty(null, typeof(SettingElementCollection), null, ConfigurationPropertyOptions.IsDefaultCollection); private static readonly ConfigurationPropertyCollection s_properties = new ConfigurationPropertyCollection { s_propSettings }; protected internal override ConfigurationPropertyCollection Properties => s_properties; [ConfigurationProperty("", IsDefaultCollection = true)] public SettingElementCollection Settings { get { return (SettingElementCollection)base[s_propSettings]; } } } }