问如何使用事务在EF 6中保存列表？

EN

using (ContextDB db = new ContextDB())
{
   foreach (Order item in orders)
      {
          using (var dbContextTransaction = db.Database.BeginTransaction())    
          {
              try
              {               

                  // some logic here to retrieve related payment, etc...
                   ...

                   db.Orders.Add(item);
                   db.Payments.Add(pmntRcvd) 
                   db.SaveChanges();   

                   dbContextTransaction.Commit();
               }
               catch
               {
                   // Code to log the exception
                   ...                        
                }  
           }   
      }
}