private static string EnsureUniqueness( string identity, IHtmlDocument document )
 {
     return EnsureUniqueness( identity, document.Descendants().Select( element => element.Attribute( "id" ).Value() ).NotNull() );
 }
 private static string EnsureUniqueness(string identity, IHtmlDocument document)
 {
     return(EnsureUniqueness(identity, document.Descendants().Select(element => element.Attribute("id").Value()).NotNull()));
 }