using System;

​

public record MyEnum(string value)

{

    public static implicit operator string (MyEnum x) => x.value;

    public static explicit operator MyEnum (string x) => new MyEnum(x);

    public const string A = "a";

    public const string B = "b";

    public const string C = "c";

}

public class Program

{

    public static void Main()

    {

        var e = new MyEnum("test");

        string s = e;

        Console.WriteLine(s);

        switch (e)

        {

            case "test":

                Console.WriteLine(1);

                break;

            case MyEnum.B:

                Console.WriteLine(2);

                break;

            default:

                Console.WriteLine(3);

                break;

        }

        e = (MyEnum) "test 2";

        Console.WriteLine(e);

    }

}