using System;

using System.Text.Json;

using System.Text.Json.Serialization;

//https://stackoverflow.com/questions/62644161/stringenumconverter-works-as-an-attribute-but-not-globally   

//StringEnumConverter works as a global setting

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        var c1 = new C1 {Number= Number.Two};

        Serialize(c1).Dump();

    }

    public static string Serialize(object @object)

    {

        var options = new JsonSerializerOptions

        {

            WriteIndented = true,           

            Converters = { new JsonStringEnumConverter() },

​

        };

        var json = JsonSerializer.Serialize(@object,options);       

        return json;

    }

}

enum Number

{

  One,

  Two,

  Three

  }

  class C1

  {

      public Number Number {get;set;}

  }