using System;

using System.IO;

using System.Xml;

using System.Xml.Serialization;

​

public class Program

{

    public static void Main()

    {        

        var si = new StudentInfo

        {

            Student = new Student

            {

                EnrollNo = "EnrollNo_0",

                Name = "Name_0",

                BTSReceivedOn = "BTSReceivedOn_0"

            },

            Address = new Address

            {

                City = "City_0",

                State = "State_0"

            }

        };

​

        var settings = new XmlWriterSettings

        {

            OmitXmlDeclaration = true,

            Indent = true

        };

​

        using (var sw = new StringWriter())

        using (var xr = XmlWriter.Create(sw, settings))

        {

            var serializer = new XmlSerializer(typeof(StudentInfo));

​

            var ns = new XmlSerializerNamespaces();

            ns.Add("ns0", "http://TestBizTalkMap.Student");

            ns.Add("ns1", "http://TestBizTalkMap.Address");

​

            serializer.Serialize(xr, si, ns);

​

            Console.WriteLine(sw);

        }        

    }

​

    [XmlRoot(Namespace = "http://TestBizTalkMap.Student")]

    public class StudentInfo

    {

        [XmlElement(Namespace = "")]

        public Student Student { get; set; }

        [XmlElement(Namespace = "http://TestBizTalkMap.Address")]

        public Address Address { get; set; }

    }

​

    public class Student

    {

        public string EnrollNo { get; set; }

        public string Name { get; set; }

        public string BTSReceivedOn { get; set; }

    }

​

    public class Address

    {    

        public string City { get; set; }        

        public string State { get; set; }

    }

}