PetaPoco4.0的事务为什么不会回滚

using (var srop=DbHelper.CurrentDb.GetTransaction())

        {

            ID = bp.AddModel(model).ToStr();

            #region 参与楼盘信息

            if (ID.ToInt32() > 0)

            {

                FY_ActivityProjectServer dtlServer = new FY_ActivityProjectServer();

                for (int i = 0; i <= this.Projects.Items.Count; i++)

                {

                    if (this.Projects.Items[i].Selected)

                    {

                        FY_ActivityProject dtl = new FY_ActivityProject();

                        dtl.ActivityID = ID.ToInt32();

                        dtl.ProjectID = this.Projects.Items[i].Value.ToInt32();

                        dtl.IsDel = false;

                        dtlList.Add(dtl);

                    }

                }

                dtlServer.AddModel(dtlList);

            }

            #endregion

            srop.Complete();

        }

以上是第一种写法

下面是第二种写法：

DbHelper.CurrentDb.BeginTransaction();//事务开始

        this.ModelDataCollect();

        FY_ActivityServer bp = new FY_ActivityServer();

        try

        {

            ID = bp.AddModel(model).ToStr();

            #region 参与楼盘信息

            if (ID.ToInt32() > 0)

            {

                FY_ActivityProjectServer dtlServer = new FY_ActivityProjectServer();

                for (int i = 0; i <= this.Projects.Items.Count; i++)

                {

                    if (this.Projects.Items[i].Selected)

                    {

                        FY_ActivityProject dtl = new FY_ActivityProject();

                        dtl.ActivityID = ID.ToInt32();

                        dtl.ProjectID = this.Projects.Items[i].Value.ToInt32();

                        dtl.IsDel = false;

                        dtlList.Add(dtl);

                    }

                }

                dtlServer.AddModel(dtlList);

            }

            #endregion

            DbHelper.CurrentDb.CompleteTransaction();

        }

        catch (Exception)

        {

            DbHelper.CurrentDb.AbortTransaction();

        }

以上操作有两个insert操作

第一个insert能插入成功，第二个insert方法故意让它报错，

问题来了，

PetaPoco 不会回滚，导致第一个操作插入成功，第二个操作插入失败

求解决方案