public enum PartnerCompetencesEnum
    {
        Carrier,
        Logistic
    }

    public class PartnerModel
    {
        public Guid id { get; set; }
        public string name { get; set; }
        public PartnerCompetencesEnum competence { get; set; }
    }

    public enum PartnerCompetencesEnum
    {
        [AmbientValue("49ED3267-3898-43df-9B6A-BA8157FC6C2E")]
        Carrier,
        [AmbientValue("6DDE530A-DDFB-4afd-B4F7-12D374650450")]
        Logistic
    }

    public static class Extensions
    {
        public static Guid Value(this Enum value)
        {
            AmbientValueAttribute[] va = (AmbientValueAttribute[])(value.GetType().GetField(value.ToString()).GetCustomAttributes(typeof(AmbientValueAttribute), false));
            return va.Length > 0 ? new Guid(va[0].Value.ToString()) : Guid.Empty;
        }
    }