using System;
using System.Linq;
using System.Xml.Linq;
using System.Collections;
using System.Collections.Generic;
public class MainClass{
public static void Main(){
XNamespace aw = "http://www.domain.com";
XNamespace fc = "www.anotherDomain.com";
XElement root = new XElement(aw + "Root",
new XAttribute("xmlns", "http://www.domain.com"),
new XAttribute(XNamespace.Xmlns + "fc", "www.anotherDomain.com"),
new XElement(fc + "Child",
new XElement(aw + "DifferentChild", "other content")
),
new XElement(aw + "Child2", "c2 content"),
new XElement(fc + "Child3", "c3 content")
);
Console.WriteLine(root);
}
}