using System;

using System.Xml;

using System.Xml.Linq;

using System.Linq;

public class Program

{

    public static void Main()

    {

        XNamespace xmlns = "https://MyScheme.com/v1-0 Sscheme.xsd";

        XNamespace xsi = XNamespace.Get("http://www.w3.org/2001/XMLSchema-instance");

        XNamespace schemaLocation = XNamespace.Get("https://MyScheme.com/v1-0");

        XDocument xmlDocument = new XDocument(

             new XElement(xmlns + "MyNode",

                 new XAttribute(xsi + "schemaLocation", schemaLocation),

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

                 new XElement(xmlns+"MyInfo",

                     new XElement(xmlns+"MyNumber", "string1"),

                     new XElement(xmlns+"MyName", "string2"),

                     new XElement(xmlns+"MyAddress", "string3")

                     ),

                     new XElement(xmlns+"MyInfo2",

                         new XElement(xmlns+"FirstName", "string4")

                         )

             )

         );

        Console.WriteLine(xmlDocument.ToString());

    }

}