using System;

using System.Xml;

using System.Xml.Linq;

public class Program

{

    public static void Main()

    {

        //<RSIL:Project xmlns:RSIL="http://www.url.com/RSIL" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:eQ="http://www.url.com/eQ" xsi:schemaLocation="http://www.url.com/RSIL Name_RSIL.xsd">

        XNamespace xsi = "http://www.w3.org/2001/XMLSchema-instance",

                   RSIL = "http://www.url.com/RSIL",

                   eQ = "http://www.url.com/eQ";

        XDocument doc = new XDocument(

            new XElement(RSIL + "Project",

                         new XAttribute(XNamespace.Xmlns + "RSIL", RSIL),

                         new XAttribute(XNamespace.Xmlns + "xsi", xsi),

                         new XAttribute(XNamespace.Xmlns + "eQ", eQ),

                         new XAttribute(xsi + "schemaLocation", "http://www.url.com/RSIL Name_RSIL.xsd")));

        Console.WriteLine(doc);

    }

}