using System.Text;

using System.Xml;

using System.Xml.Linq;

using System.Xml.Serialization;

using System.Collections.Generic;

using System.IO;

​

class Program

{

    static void Main()

    {

        Employee[] employees = new Employee[4];

        employees[0] = new Employee(1, "ABC", "DEF", 10000);

        employees[1] = new Employee(3, "CDE", "EFG", 30000);

        employees[2] = new Employee(4, "ABG", "KLM", 20000);

        employees[3] = new Employee(12, "MNO", "KJL", 120000);

​

        //First Method

​

        using (XmlWriter writer = XmlWriter.Create("employeesFirst.xml"))

        {

            writer.WriteStartDocument();

            writer.WriteStartElement("Employees");

​

            foreach (Employee employee in employees)

            {

                writer.WriteStartElement("Employee");

​

                writer.WriteElementString("ID", employee.Id.ToString());

                writer.WriteElementString("FirstName", employee.FirstName);

                writer.WriteElementString("LastName", employee.LastName);

                writer.WriteElementString("Salary", employee.Salary.ToString());

​

                writer.WriteEndElement();

            }

​

            writer.WriteEndElement();

            writer.WriteEndDocument();

        }

​

        //Second Method

​

        List<EmployeeXml> employeeXml = new List<EmployeeXml>();

        employeeXml.Add(new EmployeeXml {Id =1, FirstName ="ABC", LastName= "DEF",Salary=  10000});

        employeeXml.Add(new EmployeeXml {Id =2, FirstName ="CDE", LastName= "FGH",Salary=  60000});

        employeeXml.Add(new EmployeeXml {Id =3, FirstName ="HIJ", LastName= "KLM",Salary=  50000});

        employeeXml.Add(new EmployeeXml {Id =4, FirstName ="MNO", LastName= "PQR",Salary=  70000});

        ExportXmlFile exportXmlFile = new ExportXmlFile();

        exportXmlFile.EmployeeXML = employeeXml;

​

        var ns = new XmlSerializerNamespaces();

        ns.Add(XmlSchemaDefinitions.NameSpacePrefix, XmlSchemaDefinitions.NameSpace);

​

        var xser = new XmlSerializer(typeof(ExportXmlFile));

        using (StringWriter writer = new StringWriter())

        {

            xser.Serialize(writer, exportXmlFile,ns);

            XmlWriterSettings settings = new XmlWriterSettings();

            settings.Encoding = new UTF8Encoding(false);

            settings.Indent = true;

​

            XDocument xmlDoc = XDocument.Parse(writer.ToString());

​

            string _byteOrderMarkUtf8 = Encoding.UTF8.GetString(Encoding.UTF8.GetPreamble());

​

            using (XmlWriter xWriter = XmlWriter.Create("employeesSecond.xml", settings))

            {

                xmlDoc.WriteTo(xWriter);

            }           

        }   

​

​

    }

}

​

  public class Employee

    {

        int _id;

        string _firstName;

        string _lastName;

        int _salary;

​

        public Employee(int id, string firstName, string lastName, int salary)

        {

            _id = id;

            _firstName = firstName;

            _lastName = lastName;

            _salary = salary;

        }

​

        public int Id { get { return _id; } }

        public string FirstName { get { return _firstName; } }

        public string LastName { get { return _lastName; } }

        public int Salary { get { return _salary; } }

    }

​

 public class EmployeeXml

    {

        [XmlElement(XmlTagName.ID)]

        public int Id { get; set; }

        [XmlElement(XmlTagName.FirstName)]

        public string FirstName { get; set; }

        [XmlElement(XmlTagName.LastName)]

        public string LastName { get; set; }

        [XmlElement(XmlTagName.Salary)]

        public int Salary { get; set; }

    }

​

   public class ExportXmlFile

    {

        [XmlArray(XmlTagName.Employees)]

        [XmlArrayItem(XmlTagName.Employee)]

        public List<EmployeeXml> EmployeeXML { get; set; } = new List<EmployeeXml>();

​

    }

​

 public static class XmlTagName

    {

        public const string Employees = "Employees";

​

        public const string Employee = "Eployee";

​

        public const string ID = "ID";

​

        public const string FirstName = "First Name";

​

        public const string LastName = "Last Name";

​

        public const string Salary = "Salary";

​

    }

​

    public static class XmlSchemaDefinitions

    {

        public static string NameSpacePrefix => "xsi";

        public static string NameSpace => "http://www.w3.org/2001/XMLSchema-instance";

    }