using System;

using Newtonsoft.Json;

using Newtonsoft.Json.Converters;

using System.Text.Json;

using System.Text.Json.Serialization;

​

public class Program

{

    public static void Main()

    {

        var example = new Example{Name = "Hello World", SomeValue = 42, Terrain = Terrain.FOREST | Terrain.SWAMP | Terrain.CAVE};

        NewtonsoftExample(example);

        Console.WriteLine(string.Empty);

        SystemTextJsonExample(example);

    }

​

    private static void NewtonsoftExample(Example example)

    {

        Console.WriteLine("Serializing and Deserializing with Newtonsoft.Json:");

        var converter = new StringEnumConverter();

        var json = JsonConvert.SerializeObject(example, Formatting.Indented, converter);

        Console.WriteLine(json);

        example = JsonConvert.DeserializeObject<Example>(json /*, converter*/);

        Console.WriteLine($"example.Terrain: {example.Terrain}");

    }

​

    private static void SystemTextJsonExample(Example example)

    {

        Console.WriteLine("Serializing and Deserializing with System.Text.Json:");

        var options = new JsonSerializerOptions{WriteIndented = true, IncludeFields = true};

        options.Converters.Add(new JsonStringEnumConverter());

        var json = System.Text.Json.JsonSerializer.Serialize(example, options);

        Console.WriteLine(json);

        example = System.Text.Json.JsonSerializer.Deserialize<Example>(json , options);

        Console.WriteLine($"example.Terrain: {example.Terrain}");

    }

}

​

public class Example

{

    public string Name;

    public Terrain Terrain;

    public int SomeValue;

}

​

[Flags]

public enum Terrain

{

    NORMAL = 0,

    FOREST = 1,

    SWAMP = 2,

    CAVE = 4

}