using System.Xml; namespace System.Configuration { public sealed class SettingValueElement : ConfigurationElement { private static volatile ConfigurationPropertyCollection _properties; private static readonly XmlDocument _document = new XmlDocument(); private XmlNode _valueXml; private bool _isModified; protected internal override ConfigurationPropertyCollection Properties => _properties ?? (_properties = new ConfigurationPropertyCollection()); public XmlNode ValueXml { get { return _valueXml; } set { _valueXml = value; _isModified = true; } } protected internal override void DeserializeElement(XmlReader reader, bool serializeCollectionKey) { ValueXml = _document.ReadNode(reader); } public override bool Equals(object settingValue) { SettingValueElement settingValueElement = settingValue as SettingValueElement; if (settingValueElement != null) return object.Equals(settingValueElement.ValueXml, ValueXml); return false; } public override int GetHashCode() { return ValueXml?.GetHashCode() ?? 0; } protected internal override bool IsModified() { return _isModified; } protected internal override void ResetModified() { _isModified = false; } protected internal override bool SerializeToXmlElement(XmlWriter writer, string elementName) { if (ValueXml != null) { if (writer != null) ValueXml?.WriteTo(writer); return true; } return false; } protected internal override void Reset(ConfigurationElement parentElement) { base.Reset(parentElement); ValueXml = ((SettingValueElement)parentElement).ValueXml; } protected internal override void Unmerge(ConfigurationElement sourceElement, ConfigurationElement parentElement, ConfigurationSaveMode saveMode) { base.Unmerge(sourceElement, parentElement, saveMode); ValueXml = ((SettingValueElement)sourceElement).ValueXml; } } }