public abstract class XmlNode : ICloneable, IEnumerable, System.Xml.XPath.IXPathNavigable {
// Public Instance Properties
   public virtual XmlAttributeCollection Attributes{get; } 
   public virtual string BaseURI{get; } 
   public virtual XmlNodeList ChildNodes{get; } 
   public virtual XmlNode FirstChild{get; } 
   public virtual bool HasChildNodes{get; } 
   public virtual string InnerText{set; get; } 
   public virtual string InnerXml{set; get; } 
   public virtual bool IsReadOnly{get; } 
   public virtual XmlNode LastChild{get; } 
   public abstract string LocalName{get; } 
   public abstract string Name{get; } 
   public virtual string NamespaceURI{get; } 
   public virtual XmlNode NextSibling{get; } 
   public abstract XmlNodeType NodeType{get; } 
   public virtual string OuterXml{get; } 
   public virtual XmlDocument OwnerDocument{get; } 
   public virtual XmlNode ParentNode{get; } 
   public virtual string Prefix{set; get; } 
   public virtual XmlNode PreviousSibling{get; } 
   public virtual XmlElement this[ string name ]{get; } 
   public virtual XmlElement this[ string localname, string ns ]{get; } 
   public virtual string Value{set; get; } 
// Public Instance Methods
   public virtual XmlNode AppendChild( XmlNode newChild);  
   public virtual XmlNode Clone( );  
   public abstract XmlNode CloneNode( bool deep);  
   public XPathNavigator CreateNavigator( );                           // implements System.Xml.XPath.IXPathNavigable
   public IEnumerator GetEnumerator( );                                // implements IEnumerable
   public virtual string GetNamespaceOfPrefix( string prefix);  
   public virtual string GetPrefixOfNamespace( string namespaceURI);  
   public virtual XmlNode InsertAfter( XmlNode newChild, XmlNode refChild);  
   public virtual XmlNode InsertBefore( XmlNode newChild, XmlNode refChild);  
   public virtual void Normalize( );  
   public virtual XmlNode PrependChild( XmlNode newChild);  
   public virtual void RemoveAll( );  
   public virtual XmlNode RemoveChild( XmlNode oldChild);  
   public virtual XmlNode ReplaceChild( XmlNode newChild, XmlNode oldChild);  
   public XmlNodeList SelectNodes( string xpath);  
   public XmlNodeList SelectNodes( string xpath, XmlNamespaceManager nsmgr);  
   public XmlNode SelectSingleNode( string xpath);  
   public XmlNode SelectSingleNode( string xpath, XmlNamespaceManager nsmgr);  
   public virtual bool Supports( string feature, string version);  
   public abstract void WriteContentTo( XmlWriter w);  
   public abstract void WriteTo( XmlWriter w);  
}