使用EF，当使用事物时， SaveChanges()返回了1，但是数据库没有增加任何数据；去掉事物时，却反而添加成功了，why？？？？？

[weixin_38050219]

  public static int AddTeacherAndUser(Teacher teacher, int[] Roles)
        {
            int rows = -1;
            teacher.IsDelete = 0;
            teacher.CreateTime = DateTime.Now;
            teacher.UpdateTime = DateTime.Now;
            #region 构造用户信息
            UserInfo user = new UserInfo
                  {
                      UserCode = teacher.Code,
                  };
            user.UserPwd = MD5Helper.EncryptByMD5(MD5Helper.MD5Head_CIDP + teacher.Code);
            if (Roles != null)
            {
                user.Role = string.Join(",", Roles);
            }
            else
            {
                user.Role = "";
            }
            #endregion
            using (TransactionScope scope = new TransactionScope())//启用事务
            {
                using (LeaveEntities db = new LeaveEntities())
                {

                    try
                    {
                        db.Teacher.Add(teacher);
                        db.UserInfo.Add(user);
                        rows = db.SaveChanges();
                    }
                    catch (Exception)
                    {
                        scope.Dispose();
                        //throw;
                    }
                }
            }
            return rows;
        }

我擦，很诡异有木有~