namespace WebApplication1.Models

{

    /// <summary>

    ///     可持久到数据库的领域模型的基类。

    /// </summary>

    [Serializable]

    public abstract class EntityBase<TKey>

    {

        #region 构造函数

        /// <summary>

        ///     数据实体基类

        /// </summary>

        protected EntityBase()

        {

            IsDeleted = false;

            AddDate = DateTime.Now;

        }

        #endregion

        #region 属性

        [Key]

        public TKey Id { get; set; }

        /// <summary>

        ///获取或设置 获取或设置是否禁用，逻辑上的删除，非物理删除

        /// </summary>

        public bool IsDeleted { get; set; }

        /// <summary>

        ///     获取或设置 添加时间

        /// </summary>

        [DataType(DataType.DateTime)]

        public DateTime AddDate { get; set; }

        #endregion

    }

}

namespace WebApplication1.Models

{

    public partial class SystemAreas : EntityBase<string>

    {

        public SystemAreas()

        {

            this.ChildSystemAreas = new HashSet<SystemAreas>();

        }

        public string Name { get; set; }

        public string ParentId { get; set; }

        public virtual ICollection<SystemAreas> ChildSystemAreas { get; set; }

        public virtual SystemAreas ParentSystemAreas { get; set; }

    }

}

public ActionResult Index()

{

    SystemAreas sa = new SystemAreas()

    {

        Id="",

        Name = "test"

    };

    TestDbContext db = new TestDbContext();

    db.Set<SystemAreas>().Add(sa);

    db.SaveChanges();

    return View();

}