枚举初使用

    public enum MatRequireStatus
    {
        /// <summary>
        /// 待处理
        /// </summary>
        [Description("待处理")]
        Pending = 0,
        /// <summary>
        /// 已派单
        /// </summary>
        [Description("已派单")]
        HasBeenSent = 1,
        /// <summary>
        /// 已处理
        /// </summary>        
        [Description("已处理")]
        Processed = 2
    }

TransOrder transOrder = new TransOrder()
            {                
                Status = Convert.ToDouble( MatRequireStatus.Pending)
            };

            foreach (var item in list)
            {
                item.StatusDesc = Enum.GetName(typeof(MatRequireStatus), Convert.ToInt32(item.Status));
            }

        /// <summary>
        /// 获取枚举值的描述文本
        /// </summary>
        /// <param name="e">枚举值</param>
        /// <returns></returns>
        public string Description(Enum e)
        {
            Type enumType = e.GetType();
            var fieldInfo = enumType.GetFields().FirstOrDefault(a => a.Name == Enum.GetName(enumType, e));
            object[] obj = fieldInfo.GetCustomAttributes(typeof(DescriptionAttribute), false);
            if (obj == null) return null;

            DescriptionAttribute des = (DescriptionAttribute)obj[0];
            return des.Description;
        }

MatRequireStatus mat = MatRequireStatus.Processed;
var desc= Description(mat);
或者

foreach (var item in list)
{
item.StatusDesc = Description((MatRequireStatus)Convert.ToInt32(item.Status));
}