using System;

using System.Text.Json;

public class Program

{

    public static void Main()

    {

        var test = new TestClass{

            test = Test.One,    

        };

        var str = "{\"test\":1}";

        var json = JsonSerializer.Deserialize<TestClass>(str);

        Console.Write(json.test.ToString());

    }

    public enum Test {

        One = 1,

        One2 = 1

    }

    public class TestClass {

        public Test test {get;set;} 

    }

}