delete from xml file using linq

Hi i want to delete one record from xml file

this is the code

XDocument xmlDoc = XDocument.Load(Server.MapPath("people.xml"));
var persons = from person in xmlDoc.Descendants("Person")
where person.Element("id").Value == "100"
select person;


// persons.Remove();

foreach (XElement person in persons.ToList())
{
person.Remove();

}
xmlDoc.Save(Server.MapPath("People.xml"));

this is working
but i want to change
where person.Element("id").Value == "100"
in to
where person.Element("id").Value = convert.toint32(textbox1.text)
i tried but showing errors
any solution

K L BAIJU