Remove elements from a XML file

private static XDocument GetFilteredData(XDocument resultXML)

{

 //Remove elements of xpath item/title
 //that doesn't contains the title value as 'genome'

 resultXML.Descendants("item").Descendants("title").Where(x => !(x.Value.ToLower().Contains("genome"))).Select(tit => tit.Parent).Remove();

 return resultXML;

}