[C#]枚举类型定义错误码和获取描述信息

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Reflection;
using System.ComponentModel;
using System.ServiceModel;
using System.ServiceModel.Web;
using System.Runtime.Serialization;
using System.IO;

namespace MyLibrary
{
    public enum ErrorCode
    {
        [Description("成功")]
    Success = 0,
        [Description("未知错误")]
    Failed = 1,
        [Description("服务暂不可用")]
    NoService = 2,
        [Description("未知方法")]
    UnsupportedMethod = 3,
        [Description("请求参数无效")]
    InvalidParameter = 4,
        [Description("读取配置文件出错")]
    ReadConfigFailed = 5,
        [Description("数据库连接出错")]
    DBConectionFailed = 6
    }

    public class CommonUtils
    {
        /// <summary>
        /// 获取枚举项描述信息 例如GetEnumDesc(Days.Sunday)
        /// </summary>
        /// <param name="en">枚举项 如Days.Sunday</param>
        /// <returns></returns>
        public static string GetEnumDesc(Enum en)
        {
            Type type = en.GetType();
            MemberInfo[] memInfo = type.GetMember(en.ToString());
            if (memInfo != null && memInfo.Length > 0)
            {
                object[] attrs = memInfo[0].GetCustomAttributes(typeof(DescriptionAttribute), false);
                if (attrs != null && attrs.Length > 0)
                {
                    return ((DescriptionAttribute)attrs[0]).Description;
                }
            }
            return en.ToString();
        }
    }
}