using Newtonsoft.Json;

using System;

using System.Dynamic;

public class Program

{

    public static void Main()

    {

        SampleObject noName = new SampleObject() { Company = "Acme" };

        SampleObject noCompany = new SampleObject() { Name = "Fred Foo" };

        SampleObject defaultEmpty = new SampleObject();

        Console.WriteLine("Standard class serialization");

        Console.WriteLine($"    noName: { JsonConvert.SerializeObject(noName) }");

        Console.WriteLine($"    noCompany: { JsonConvert.SerializeObject(noCompany) }");

        Console.WriteLine($"    defaultEmpty: { JsonConvert.SerializeObject(defaultEmpty) }");

        Console.WriteLine("ExpandoObject serialization");

        Console.WriteLine($"    noName: { JsonConvert.SerializeObject(noName.CreateDynamicForPatch()) }");

        Console.WriteLine($"    noCompany: { JsonConvert.SerializeObject(noCompany.CreateDynamicForPatch()) }");

        Console.WriteLine($"    defaultEmpty: { JsonConvert.SerializeObject(defaultEmpty.CreateDynamicForPatch()) }");

    }

}

​

public class SampleObject {

    public string Name { get; set; }

    public string Company { get; set; }

    public object CreateDynamicForPatch()

    {

        dynamic x = new ExpandoObject();

        if (!string.IsNullOrWhiteSpace(Name))

        {

            x.name = Name;

        }

        if (!string.IsNullOrEmpty(Company))

        {

            x.Company = Company;

        }

        return x;

    }

}