数据注解属性--TimeStamp特性【Code-First 系列】

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace EF2
{
    [Table("StudentInfo")]
   public class Student
    {
        [Key]
        [Column(Order=1)]
        public int StudentKey1 { get; set; }

        [Key]
        [Column(Order=2)]
        public int StudentKey2 { get; set; }

        [Column("Name",TypeName="ntext")]
        [MaxLength(20)]
        public string StudentName { get; set; }

        [NotMapped()]
        public int? Age { get; set; }

        public int StdId { get; set; }

        [ForeignKey("StdId")]
        public virtual Standard Standard { get; set; }

        [Timestamp]
        public byte[] RowVersion { get; set; }

    }
}