using System;

using System.Text.Json;

using System.Text.Json.Serialization;

public class Program

{

    // JSON sample from question

    const string JsonSample = @"{

    ""Name"":""Abhishek"",

    ""Department.Id"":""28699787678679"",

    ""Department.Name"":""IT"",

    ""Address.City"":""SomeCity"",

    ""Address.State"":""SomeState"",

    ""Address.ZipCode"":""29220""

}";

    public static void Main()

    {

        // Deserialize to proxy type

        var deser = JsonSerializer.Deserialize<EmployeeSer>(JsonSample);

        // Convert to Employee and print

        Employee emp = deser;

        emp.Print();

        Console.WriteLine();

        // Convert to proxy type

        EmployeeSer ser = emp;

        // Serialize to JSON and print

        var json = JsonSerializer.Serialize(ser);

        Console.WriteLine(json);

    }

}

​

class Employee

{

    public string Name { get; set; }

    public Department Department { get; set; }

    public Address Address { get; set; }

​

    public void Print()

    {

        Console.WriteLine($"Name:\t{Name}");

        if (Department != null)

        {

            Console.WriteLine("Department:");

            Console.WriteLine($"\tID:\t{Department.Id}");

            Console.WriteLine($"\tName:\t{Department.Name}");

        }

        if (Address != null)

        {

            Console.WriteLine("Address:");

            Console.WriteLine($"\tCity:\t{Address.City}");

            Console.WriteLine($"\tState:\t{Address.State}");

            Console.WriteLine($"\tZipCode:\t{Address.ZipCode}");

        }

    }

}

​

class Department

{

    public string Id { get; set; }

    public string Name { get; set; }

}

​

class Address

{

    public string City { get; set; }

    public string State { get; set; }

    public string ZipCode { get; set; }

}

​

// Serialization proxy for Employee class

class EmployeeSer

{

    [JsonPropertyName("Name")]

    public string Name { get; set; }

    [JsonPropertyName("Department.Id")]

    public string DeptId { get; set; }

    [JsonPropertyName("Department.Name")]

    public string DeptName { get; set; }

    [JsonPropertyName("Address.City")]

    public string AddrCity { get; set; }

    [JsonPropertyName("Address.State")]

    public string AddrState { get; set; }

    [JsonPropertyName("Address.ZipCode")]

    public string AddrZip { get; set; }

    // Implicit conversion to Employee

    public static implicit operator Employee(EmployeeSer source)

        => new Employee 

        {

            Name = source.Name,

            Department = new Department

            {

                Id = source.DeptId,

                Name = source.DeptName,

            },

            Address = new Address

            {

                City = source.AddrCity,

                State = source.AddrState,

                ZipCode = source.AddrZip,

            }

        };

    // Implicit conversion from Employee

    public static implicit operator EmployeeSer(Employee source)

        => new EmployeeSer

        {

            Name = source.Name,

            DeptId = source.Department?.Id,

            DeptName = source.Department?.Name,

            AddrCity = source.Address?.City,

            AddrState = source.Address?.State,

            AddrZip = source.Address?.ZipCode,

        };

}