减少重复工作，通过泛型、反射写一个通用的Ado.net操作数据库的简单orm底层

 public class BaseEntity
    {
        [PrimaryKey]
        public int Id { get; set; }
        public DateTime CreateTime { get; set; }
        public Status Status { get; set; }
        public string Remark { get; set; }
    }

    /// <summary>
    /// 自增主键标识
    /// </summary>
    public class PrimaryKey : Attribute
    {

    }
 public class BaseEnti