首先创建一个枚举类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MyAttribute
{
    public enum UserState
    {
        /// <summary>
        /// 正常
        /// </summary>
        [Remark("正常")]
        Normal = 0,
        /// <summary>
        /// 冻结
        /// </summary>
        [Remark("冻结")]
        Frozen = 1,
        /// <summary>
        /// 删除
        /// </summary>
        [Remark("删除")]
        Deleted = 2
    }
}

使用枚举类生成一个对象，并对枚举中每一项进行赋值；这样操作比较麻烦而且不灵活。

static void Main(string[] args)
{
       UserState userState = UserState.Frozen;
       if (userState == UserState.Normal)
       {
           Console.WriteLine("正常");
       }
       else if (userState == UserState.Frozen)
      {
           Console.WriteLine("冻结");
       }
}

以上是通过类对象的实现。下面通过特性来操作。首先创建一个特性

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MyAttribute
{
    
    [AttributeUsage(AttributeTargets.Field)]
    public class RemarkAttribute:Attribute
    {
        /// <summary>
        /// 状态特性
        /// </summary>
        /// <param name="remark"></param>
        public RemarkAttribute(string remark)
        {
            this.Remark = remark;
        }
        public string Remark { get;private set; }
    }
}

创建一个调用特性的类AtrributeInvoke.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;

namespace MyAttribute
{
    public class AttributeInvoke
    {
        /// <summary>
        /// 接收一个枚举对象
        /// </summary>
        /// <param name="userState"></param>
        /// <returns></returns>
        public string GetRemark(UserState userState)
        {
            Type type = userState.GetType(); //能过枚举对象获取类型
            var fileId = type.GetField(userState.ToString()); //从枚举对象中获取字段
            if (fileId .IsDefined(typeof(RemarkAttribute),true)) //判断字段是否为特性
            {
                RemarkAttribute remarkAttribute = (RemarkAttribute)fileId.GetCustomAttribute(typeof(RemarkAttribute), true);
                return remarkAttribute.Remark; //如果字段是特性则调用特性中的Remark
            }
            else
            {
                return userState.ToString();
            }
        }
    }
}

在Main函数中进行实例化并调用

static void Main(string[] args)
{
     UserState userState = UserState.Frozen;
     AttributeInvoke attributeInvoke = new AttributeInvoke();
     Console.WriteLine(attributeInvoke.GetRemark(userState));
}

通过特性操作的方法也能实现同样的功能