小编Har*_*ran的帖子

我是C#和EF的初学者.在设计我的新样本应用程序时,我有一个愚蠢的疑问.抽象是否可以继承另一个抽象类

using System;
using System.ComponentModel.DataAnnotations;

namespace Spark.BusinessObjects.Common
{
   public abstract class BOBase
   {
    public virtual int UpdatedBy { get; set; }

    [DataType(DataType.DateTime)]
    public virtual DateTime UpdatedOn { get; set; }
 }

  public abstract class MasterBOBase : BOBase
 {
    public virtual int CreatedBy { get; set; }

    [DataType(DataType.DateTime)]
    public virtual DateTime CreatedOn { get; set; }
 }
}

namespace Spark.BusinessObjects.UserManagement
{
 using System;
using System.Data.Linq.Mapping;
using System.ComponentModel.DataAnnotations;

using Spark.BusinessObjects.Common;

[Table(Name = "tblUser")]
public class User:BOBase
{
    [Key]        
    public virtual int UserID …