Enumに別名？をつけて表示する

Enumに別名？をつけて表示する.cs

    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine(Gender.Female.ToJapanese());
            Console.ReadLine();
        }
    }

    public enum Gender
    {
        [Japanese("不明")]
        Unknown,
        [Japanese("男性")]
        Male,
        [Japanese("女性")]
        Female
    }

    public class JapaneseAttribute : Attribute
    {
        public string Label { get; set; }

        public JapaneseAttribute(string label)
        {
            Label = label;
        }
    }

    public static class GenderExtensions
    {
        public static string ToJapanese<T>(this T hasJapaneseValue) where T : struct
        {
            Type type = hasJapaneseValue.GetType();
            if (!type.IsEnum)
            {
                throw new ArgumentException();
            }

            var memberInfo = type.GetMember(hasJapaneseValue.ToString()).Single();
            var attribute = memberInfo.GetCustomAttribute<JapaneseAttribute>();
            return attribute?.Label;
        }
    }