using System;

using System.Linq;

using System.Xml;                   

using System.Xml.Linq;

using System.Collections; 

using System.Collections.Generic;

using System.Data;

using System.Data.DataSetExtensions;

using System.Data.Linq;

using System.Text;

using System.Text.RegularExpressions;

using System.Xml.Serialization; 

using System.IO;

using System.Globalization;

using System.Diagnostics;

public class Program

{

    public static void Main()

    {

        string input = @"<HUMAN_VERIFICATION xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance"" xmlns:xsd=""http://www.w3.org/2001/XMLSchema"">

  <RESPONSE_DATA>

    <RESPONSE_STATUS>

      <ERROR>100</ERROR>

      <MESSAGE>successful</MESSAGE>

    </RESPONSE_STATUS>

    <CONTACT_NUMBER>3120202456011</CONTACT_NUMBER>

    <PERSON_DATA>

      <NAME>Alex</NAME>

      <DATE_OF_BIRTH>10-9-1982</DATE_OF_BIRTH>

      <BIRTH_PLACE>Washington</BIRTH_PLACE>

      <EXPIRY>2020-12-15</EXPIRY>

    </PERSON_DATA>

    <CARD_TYPE>idcard</CARD_TYPE>

  </RESPONSE_DATA>

</HUMAN_VERIFICATION>";

        XDocument doc = XDocument.Parse(input);

        var results = doc.Descendants("PERSON_DATA")

            .Select(x=> new 

                    {

                        NAME = (string)x.Element("NAME"),

                        DATE_OF_BIRTH = (string)x.Element("DATE_OF_BIRTH"),

                        BIRTH_PLACE = (string)x.Element("BIRTH_PLACE"),

                        EXPIRY = (string)x.Element("EXPIRY"),

                    });

        foreach(var result in results)

        {

            Console.WriteLine("{0}, {1}, {2}, {3}",result.NAME,result.DATE_OF_BIRTH,result.BIRTH_PLACE,result.EXPIRY);

        }

    }

}