using System;

using Newtonsoft.Json;

public class Program

{   

    public static void Main()

    {

        var example = new MyExample();

        Console.WriteLine($"1: {example.ExampleEnum1}");

        Console.WriteLine($"2: {example.ExampleEnum2}");

        Console.WriteLine($"3: {example.ExampleEnum3}");

        var serializedExample = Newtonsoft.Json.JsonConvert.SerializeObject(example);

        var deserializedExample = Newtonsoft.Json.JsonConvert.DeserializeObject<MyExample>(serializedExample);      

        Console.WriteLine($"1 (deserialized): {deserializedExample.ExampleEnum1}");

        Console.WriteLine($"2 (deserialized): {deserializedExample.ExampleEnum2}");

        Console.WriteLine($"3 (deserialized): {deserializedExample.ExampleEnum3}");

    }

}

​

public enum MyEnum { X = 0, Y = 1 };

public enum MyOtherEnum { Unknown = 0, X = 1, Y = 2 };

​

public class MyExample

{

    public MyEnum ExampleEnum1 { get; set; }

    public MyEnum? ExampleEnum2 { get; set; }

    public MyOtherEnum ExampleEnum3 { get; set; }

}