Inheritance: System.EventArgs
 void OnKeySent( object sender, KeySentEventArgs e )
 {
     ValueSent();
 }
 protected virtual void OnOldKeySent( object sender, KeySentEventArgs e )
 {
     if( !PredictionTextAreaService.Service.IsDriven )
     {
         if( e.Key == "{BACKSPACE}" && _rawContext != null && _rawContext.Length > 0 )
         {
             var raw = _rawContext.Substring( 0, _rawContext.Length - 1 );
             _caretIndex = raw.Length;
             SetRawText( raw );
         }
         else if( e.Key == "{ENTER}" )
         {
             ClearContext();
         }
     }
 }