/// <summary>
    /// 實體類標示接(jie)口
    /// </summary>
    public interface IEntity
    {

    }

    /// <summary>
    /// 領域模(mo)(mo)型(xing)(xing)，實體模(mo)(mo)型(xing)(xing)基類，它可能有多種持久化(hua)方式，如DB,File,Redis,Mongodb,XML等
    /// Lind.DDD框架的領域模型與數據(ju)庫實體(ti)合二(er)為一
    /// </summary>
    [PropertyChangedAttribute]
    public abstract class EntityBase :
        // ContextBoundObject,//屬性(xing)變(bian)(bian)化(hua)跟蹤，這(zhe)(zhe)個(ge)可以在具體的實體上添加，需要記錄它的set變(bian)(bian)化(hua)，就(jiu)添加這(zhe)(zhe)個(ge)特性(xing)
        IEntity,
        INotifyPropertyChanged
    {
        #region Contructors
        /// <summary>
        /// 實(shi)體初始化
        /// </summary>
        public EntityBase()
            : this(Status.Normal, DateTime.Now, DateTime.Now)
        { }
        /// <summary>
        /// 帶參數的初始化
        /// </summary>
        /// <param name="status">狀態</param>
        /// <param name="updateDateTime">更新(xin)日期</param>
        /// <param name="createDateTime">插入日期</param>
        public EntityBase(Status status, DateTime updateDateTime, DateTime createDateTime)
        {
            this.DataStatus = Status.Normal;
            this.DataUpdateDateTime = DateTime.Now;
            this.DataCreateDateTime = DateTime.Now;
            this.PropertyChanged += EntityBase_PropertyChanged;
        }
        #endregion

        #region Properties
        /// <summary>
        /// 建立(li)時間(jian)
        /// </summary>
        [XmlIgnore, DataMember(Order = 3), XmlElement(Order = 3), DisplayName("建立時間"), Required]
        public DateTime DataCreateDateTime { get; set; }
        /// <summary>
        /// 更新(xin)時(shi)間(jian)
        /// </summary>
        [XmlIgnore, DataMember(Order = 2), XmlElement(Order = 2), DisplayName("更新時(shi)間"), Required]
        public DateTime DataUpdateDateTime { get; set; }
        /// <summary>
        /// 實體狀態
        /// </summary>
        [XmlIgnore, DataMember(Order = 1), XmlElement(Order = 1), DisplayName("狀態"), Required]
        public Status DataStatus { get; set; }
        #endregion

        #region Methods
        /// <summary>
        /// 拿到(dao)實(shi)體驗證的結果列表(biao)
        /// 結果為null或者Enumerable.Count()==0表(biao)達驗(yan)證成功(gong)
        /// </summary>
        /// <returns></returns>
        public IEnumerable<RuleViolation> GetRuleViolations()
        {
            var properties = this.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance).ToArray();

            foreach (var i in properties)
            {
                var attr = i.GetCustomAttributes();
                foreach (var a in attr)
                {
                    var val = (a as ValidationAttribute);
                    if (val != null)
                        if (!val.IsValid(i.GetValue(this)))
                        {
                            yield return new RuleViolation(val.ErrorMessage, i.Name);
                        }
                }
            }

        }
        #endregion

        #region PropertyChangedEventHandler Events
        /// <summary>
        /// 屬性值(zhi)變更(geng)事(shi)件，外部可以直(zhi)接訂閱它
        /// </summary>
        public event PropertyChangedEventHandler PropertyChanged;
        /// <summary>
        /// 事件(jian)實例
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void EntityBase_PropertyChanged(object sender, PropertyChangedEventArgs e)
        {
            Console.WriteLine("基類EntityBase屬性:{0},值:{1}", e.PropertyName, sender.GetType().GetProperty(e.PropertyName).GetValue(sender));
        }
        /// <summary>
        /// 觸發事件,寫在每個(ge)屬(shu)性的(de)(de)set塊中(zhong)CallerMemberName特性表示(shi)當前塊的(de)(de)屬(shu)性名
        /// </summary>
        /// <param name="propertyName"></param>
        protected void OnPropertyChanged([CallerMemberName] string propertyName = null)
        {
            if (PropertyChanged != null)
                PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
        }

        #endregion

    }

　　 /// <summary>
    /// 主鍵(jian)為int類型(xing)的實(shi)體基類
    /// </summary>
    public abstract class Entity : EntityBase
    {
        /// <summary>
        /// 標識列
        /// </summary>
        [DisplayName("編號"), Column("ID"), Required]
        public int Id { get; set; }
    }

　　/// <summary>
    /// mongodb,xml,redis實體基(ji)類
    /// 主鍵類型為string
    /// </summary>
    public abstract class NoSqlEntity : EntityBase
    {
        public NoSqlEntity()
        {
            this.Id = ObjectId.GenerateNewId().ToString();
        }
        /// <summary>
        /// 標識列(lie)
        /// </summary>
        [BsonId]
        [BsonRepresentation(BsonType.ObjectId)]
        [DataMember(Order = 0), XmlElement(Order = 0), DisplayName("編號"), Column("ID"), Required]
        public string Id { get; set; }

        /// <summary>
        /// 返回mongodb實體的鍵值對(dui)
        /// </summary>
        public IEnumerable<KeyValuePair<string, object>> GetProperyiesDictionary()
        {
            var properties = this.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance)
                   .Where(i => i.Name != "Id")
                   .ToArray();

            foreach (var i in properties)
                yield return new KeyValuePair<string, object>(i.Name, i.GetValue(this));

        }
    }