using System;

public class Program

{

    public enum RegulatedMarketType

    {

        spain = 0,

        southafrica = 1

    }

    public class AccountDetail

    {

        public string RegulatedMarketType {get; set;}

    }

    public static void Main()

    {

        var accountDetail = new AccountDetail

        {

            RegulatedMarketType = "spain"

        };

        RegulatedMarketType type;

        if (Enum.TryParse(accountDetail.RegulatedMarketType, true, out type))

        {

            Write(type);

        }

        try

        {

            var test = (RegulatedMarketType?)Enum.Parse(typeof(RegulatedMarketType), accountDetail.RegulatedMarketType, true);

            Write(test);

        }

        catch

        {

            Console.WriteLine("{0} is not an underlying value of the RegulatedMarketType enumeration.", accountDetail.RegulatedMarketType);

        }        

    }

    private static void Write(RegulatedMarketType? type)

    {

        Console.WriteLine(type);

    }

};