public abstract class XPathNavigator : ICloneable {
// Protected Constructors
   protected XPathNavigator( );  
// Public Instance Properties
   public abstract string BaseURI{get; } 
   public abstract bool HasAttributes{get; } 
   public abstract bool HasChildren{get; } 
   public abstract bool IsEmptyElement{get; } 
   public abstract string LocalName{get; } 
   public abstract string Name{get; } 
   public abstract string NamespaceURI{get; } 
   public abstract XmlNameTable NameTable{get; } 
   public abstract XPathNodeType NodeType{get; } 
   public abstract string Prefix{get; } 
   public abstract string Value{get; } 
   public abstract string XmlLang{get; } 
// Public Instance Methods
   public abstract XPathNavigator Clone( );  
   public virtual XmlNodeOrder ComparePosition( XPathNavigator nav);  
   public virtual XPathExpression Compile( string xpath);  
   public virtual object Evaluate( string xpath);  
   public virtual object Evaluate( XPathExpression expr);  
   public virtual object Evaluate( XPathExpression expr, XPathNodeIterator context);  
   public abstract string GetAttribute( string localName, string namespaceURI);  
   public abstract string GetNamespace( string name);  
   public virtual bool IsDescendant( XPathNavigator nav);  
   public abstract bool IsSamePosition( XPathNavigator other);  
   public virtual bool Matches( string xpath);  
   public virtual bool Matches( XPathExpression expr);  
   public abstract bool MoveTo( XPathNavigator other);  
   public abstract bool MoveToAttribute( string localName, string namespaceURI);  
   public abstract bool MoveToFirst( );  
   public abstract bool MoveToFirstAttribute( );  
   public abstract bool MoveToFirstChild( );  
   public bool MoveToFirstNamespace( );  
   public abstract bool MoveToFirstNamespace( XPathNamespaceScope namespaceScope);  
   public abstract bool MoveToId( string id);  
   public abstract bool MoveToNamespace( string name);  
   public abstract bool MoveToNext( );  
   public abstract bool MoveToNextAttribute( );  
   public bool MoveToNextNamespace( );  
   public abstract bool MoveToNextNamespace( XPathNamespaceScope namespaceScope);  
   public abstract bool MoveToParent( );  
   public abstract bool MoveToPrevious( );  
   public abstract void MoveToRoot( );  
   public virtual XPathNodeIterator Select( string xpath);  
   public virtual XPathNodeIterator Select( XPathExpression expr);  
   public virtual XPathNodeIterator SelectAncestors( string name, string namespaceURI, bool matchSelf);  
   public virtual XPathNodeIterator SelectAncestors( XPathNodeType type, bool matchSelf);  
   public virtual XPathNodeIterator SelectChildren( string name, string namespaceURI);  
   public virtual XPathNodeIterator SelectChildren( XPathNodeType type);  
   public virtual XPathNodeIterator SelectDescendants( string name, string namespaceURI, bool matchSelf);  
   public virtual XPathNodeIterator SelectDescendants( XPathNodeType type, bool matchSelf);  
   public override string ToString( );                                 // overrides object
}