Sorting Customers Orders XML (XDocument)

using System.Collections.Generic;
using System;
using System.Linq;

var thisElemnt = XElement.Load(path1);
            foreach (XElement cust in input.Root.Elements("customer"))
            {
                cust.Element("orders").ReplaceWith(new XElement("orders",
                    from n in cust.Element("orders").Elements("order")
                    orderby Convert.ToInt32(n.Element("id").Value)
                    select n));

            }
            input.Save(path1);