public abstract class XmlCharacterData : XmlLinkedNode {
// Protected Constructors
   protected internal XmlCharacterData( string data, XmlDocument doc);  
// Public Instance Properties
   public virtual string Data{set; get; } 
   public override string InnerText{set; get; }                       // overrides XmlNode
   public virtual int Length{get; } 
   public override string Value{set; get; }                           // overrides XmlNode
// Public Instance Methods
   public virtual void AppendData( string strData);  
   public virtual void DeleteData( int offset, int count);  
   public virtual void InsertData( int offset, string strData);  
   public virtual void ReplaceData( int offset, int count, string strData);  
   public virtual string Substring( int offset, int count);  
}