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;
            }
        }