using System;

using System.Xml.Linq;

​

public class Program

{

    public static void Main(string[] args)

    {

        var doc = new XDocument(

            new XDeclaration("1.0", "utf-8", "no"));

​

        var root = new XElement("Application",

            new XElement("organisation",

                new XElement("organisation_id", "0")),

            new XElement("address",

                new XElement("address1", "123456"),

                new XElement("address2", "qqqqq"),

                new XElement("address3", "ddddd")));

​

        doc.Add(root);

​

        var customers = new XElement("Customer",

            new XElement("custID", "652"),

            new XElement("address1", "12345")

            );

​

        root.Add(customers);

​

        var references = new XElement("references",

            new XElement("f_ref", "456789"));

​

        var licenses = new XElement("licenses",

            new XElement("id", "3654"),

            new XElement("image", @"\photo\123.jpg"));

​

        references.Add(licenses);

​

        var type = new XElement("type",

            new XElement("sort", "1"),

            new XElement("date", "12/12/1997"));

​

        customers.Add(type);

​

        var @internal = new XElement("internal",

            new XElement("auto", "true"),

            new XElement("deliver", "true"));

​

        customers.Add(@internal);

​

        Console.WriteLine(doc);

    }

}