using System;

using System.Collections.Generic;

using System.Xml.Serialization;

using System.IO;

public class Program

{

    public static void Main()

    {

        string input = @"<?xml version=""1.0"" encoding=""utf-16""?>

<Records count=""2"">

  <Metadata>

    <FieldDefinitions>

      <FieldDefinition id=""1001"" name=""Request ID"" alias=""Q_ID"" />

      <FieldDefinition id=""1002"" name=""User"" alias=""Target"" />

      <FieldDefinition id=""1003"" name=""Which item(s) is the access requested for?"" alias=""Which_items_is_requested"" />

      <FieldDefinition id=""1004"" name=""Select specific(s) for item1"" alias=""item1"" />

      <FieldDefinition id=""1005"" name=""Select specific(s) for item2"" alias=""item2"" />

      <FieldDefinition id=""1006"" name=""Select specific(s) for item3"" alias=""item3"" />

      <FieldDefinition id=""101"" name=""First Name"" alias=""First_Name"" />

      <FieldDefinition id=""102"" name=""Last Name"" alias=""Last_Name"" />

      <FieldDefinition id=""100"" name=""Email"" alias=""Email"" />

    </FieldDefinitions>

  </Metadata>

  <LevelCounts>

    <LevelCount id=""989"" count=""2"" />

    <LevelCount id=""85"" count=""2"" />

  </LevelCounts>

  <Record contentId=""1092725"" levelId=""989"" moduleId=""564"">

    <Record contentId=""736205"" levelId=""85"" moduleId=""84"">

      <Field id=""100"" type=""1"">john.smith@abc.com</Field>

      <Field id=""101"" type=""1"">John</Field>

      <Field id=""102"" type=""1"">Smith</Field>

    </Record>

    <Field id=""1003"" type=""4"">

      <ListValues>

        <ListValue id=""11"" displayName=""Issues Management"">item1</ListValue>

        <ListValue id=""13"" displayName=""Master Control Procedures"">item3</ListValue>

      </ListValues>

    </Field>      

    <Field id=""1001"" type=""6"">123123</Field>

    <Field id=""1002"" type=""9"">

      <Reference id=""736205"">John Smith</Reference>

    </Field>

    <Field id=""1005"" type=""9"">

      <Reference id=""3"">item11</Reference>

      <Reference id=""3"">item12</Reference>

    </Field>

    <Field id=""1006"" type=""9"" />

    <Field id=""1004"" type=""9"">

      <Reference id=""7"">item31</Reference>

      <Reference id=""8"">item32</Reference>

    </Field>

  </Record>

  <Record contentId=""1092759"" levelId=""989"" moduleId=""564"">

    <Record contentId=""775678"" levelId=""85"" moduleId=""84"">

      <Field id=""100"" type=""1"">Peter.Smith@abc.com</Field>

      <Field id=""101"" type=""1"">Peter</Field>

      <Field id=""102"" type=""1"">Smith</Field>

    </Record>

    <Field id=""1003"" type=""4"">

      <ListValues>

        <ListValue id=""11"" displayName=""Issues Management"">item1</ListValue>

        <ListValue id=""12"" displayName=""Master Control Procedures"">item2</ListValue>

        <ListValue id=""13"" displayName=""Control Procedure"">item3</ListValue>

      </ListValues>

    </Field>      

    <Field id=""1001"" type=""6"">123124</Field>

    <Field id=""1002"" type=""9"">

      <Reference id=""775678"">Peter Smith</Reference>

    </Field>

    <Field id=""1005"" type=""9"">

      <Reference id=""3"">item11</Reference>

      <Reference id=""4"">item12</Reference>

    </Field>

    <Field id=""1006"" type=""9"">

      <Reference id=""5"">item21</Reference>

      <Reference id=""6"">item22</Reference>

    </Field>

    <Field id=""1004"" type=""9"">

      <Reference id=""7"">item31</Reference>

      <Reference id=""8"">item32</Reference>

    </Field>

  </Record>

</Records>";

        using var reader = new StringReader(input);

        var records = (Records)new XmlSerializer(typeof(Records)).Deserialize(reader);

        records.Items[0].ChildRecord.Dump();

    }

}

​

public class Records

{

    [XmlElement("Record")]

    public List<Record> Items { get; } = new();

}

​

public class Record

{

    [XmlAttribute("contentId")]

    public int ContentId { get; set; }

    [XmlElement("Record")]

    public Record ChildRecord { get; set; }

    [XmlElement("Field")]

    public List<Field> Fields { get; } = new();

}

​

public class Field

{

    [XmlAttribute("id")]

    public int Id { get; set; }

    [XmlElement("Reference")]

    public List<Reference> References { get; } = new();

    [XmlArray("ListValues")]

    public List<ListValue> ListValues { get; } = new();

    [XmlText]

    public string Content { get; set; }

}

​

public class Reference

{

    [XmlAttribute("id")]

    public int Id { get; set; }

}

​

public class ListValue

{

    [XmlAttribute("id")]

    public int Id { get; set; }

    [XmlText]

    public string Content { get; set; }

}