Class attribute with predetermined values

Question

I want to create a class attribute for sex (M or F), that by default one can already select. It is possible to create an array with these values (M and F) already default without having to type, or should do so in the same layout?

[DisplayName("SEXO")]
[StringLength(1, MinimumLength = 1, ErrorMessage = "Selecione o Sexo")]
public string Sexo { get; set; }

The way it is here (above) would be a field for the person to type, I thought to do like a:

public list<Sexo>...

AMENDING

namespace Projeto.Models
{
    public enum Sexo { M = 1, F = 2 }

    public class Pessoa
    {
        [Key]
        public int PessoaID { get; set; }

        [DisplayName("Nome")]
        [Required(ErrorMessage = "Preencha o nome")]
        [StringLength(255, MinimumLength = 3, ErrorMessage = "O nome deve ter de 3 a 255 caracteres")]
        public string Nome { get; set; }

        ...

        [DisplayName("SEXO")]
        [Required(ErrorMessage="Selecione o sexo")]
        [StringLength(1, MinimumLength = 1, ErrorMessage = "Selecione o Sexo")]
        public Sexo Sexo { get; set; }

    }
}

in making Add-Migration I receive the following message:

Answer 1

You can use a enum with defined values in the case of M = 1 and F = 2:

public enum Sexo
{
    Masculino = 1,
    Feminimo = 2
}

---

[DisplayName("SEXO")]
public Sexo Sexo { get; set; }

^{Observing: In that link has the explanation step by step. The field that is saved in the database is a respective integer values of Masculine and Feminism of enum Sexo.}

_References:

• How to Use Enum with Entity Framework 5 ?
• Entity Framework 6 Code First - Required Enum data type not Working