C#如何给枚举类型增加一个描述特性详解

　　enum StatusEnum
 {
  [Description("修改")]
  Update = 1,
  [Description("新增")]
  Insert = 2,
  [Description("删除")]
  Delete = 3
 }

/// <summary>
 /// 备注特性
 /// </summary>
 public class RemarkAttribute : Attribute
 {
  /// <summary>
  /// 备注
  /// </summary>
  public string Remark { get; set; }

  public RemarkAttribute(string remark)
  {
   this.Remark = remark;
  }
 }

 /// <summary>
 /// 枚举扩展类
 /// </summary>
 public static class EnumExtension
 {
  /// <summary>
  /// 获取枚举的备注信息
  /// </summary>
  /// <param name="em"></param>
  /// <returns></returns>
  public static string GetRemark(this Enum value)
  {
   FieldInfo fi = value.GetType().GetField(value.ToString());
   if (fi == null)
   {
    return value.ToString();
   }
   object[] attributes = fi.GetCustomAttributes(typeof(RemarkAttribute), false);
   if (attributes.Length > 0)
   {
    return ((RemarkAttribute)attributes[0]).Remark;
   }
   else
   {
    return value.ToString();
   }
  }

  public static string GetEnumDescription(this Enum value)
  {
   FieldInfo fi = value.GetType().GetField(value.ToString());
   DescriptionAttribute[] attributes = (DescriptionAttribute[])fi.GetCustomAttributes(typeof(DescriptionAttribute), false);
   if (attributes.Length > 0)
   {
    return attributes[0].Description;
   }
   else
   {
    return value.ToString();
   }
  }
 }

using System.Collections.Generic;
using System.ComponentModel;

 Console.WriteLine((int)StatusEnum.Insert);//输出原有枚举值
 Console.WriteLine(StatusEnum.Insert.GetRemark());//获取枚举备注信息
 Console.WriteLine(StatusEnum.Insert.GetEnumDescription());//获取枚举特性值