c# 枚举返回字符串操作

//内部类
public static class EnumHelper
        {
            public static string GetDescription(Enum value)
            {
                if (value == null)
                {
                    throw new ArgumentException("value");
                }
                string description = value.ToString();
                var fieldInfo = value.GetType().GetField(description);
                var attributes =
                    (EnumDescriptionAttribute[]) fieldInfo.GetCustomAttributes(typeof (EnumDescriptionAttribute), false);
                if (attributes != null && attributes.Length > 0)
                {
                    description = attributes[0].Description;
                }
                return description;
            }
        }

        // 枚举定义
        //  调用方法 
       String strKufen = EnuHelper.GetDescription(MessageInfo.Send); 
        public enum MessageInfo
        {
            [EnumDescription("Send")]
            Send,
            [EnumDescription("Received")]
            Received
        }

        [AttributeUsage(AttributeTargets.Field, AllowMultiple = false)]
        public sealed class EnumDescriptionAttribute : Attribute
        {
            private string description;
            public string Description { get { return description; } }

            public EnumDescriptionAttribute(string description)
                : base()
            {
                this.description = description;
            }
        }