c# - 使用 entry.Reload() 和 ModelState.Clear() 处理并发异常

Question

我有以下操作方法：-

[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Edit(Group group)
{
    try
    {
        if (ModelState.IsValid)
        {
            AuditInfo auditinfo = repository.IntiateAudit(2, 2, User.Identity.Name, 2);
            groupRepository.InsertOrUpdate(group);
            groupRepository.Save();
            repository.InsertOrUpdateAudit(auditinfo);
            return RedirectToAction("Index");
        }
    }
    catch (DbUpdateConcurrencyException ex)
    {
        var entry = ex.Entries.Single();
        entry.Reload();
        ModelState.Clear();
        ModelState.AddModelError(string.Empty, "The record you attempted to edit "
            + "was modified by another user after you got the original value. The "
            + "edit operation was canceled and the current values in the database "
            + "have been displayed. If you still want to edit this record, click "
            + "the Save button again. Otherwise click the Back to List hyperlink.");
    }
    catch (DbUpdateException)
    {
        ModelState.AddModelError(string.Empty, " An Error Occured, please check the Group name for uniquenee.");
    }
    catch (DataException) {
        ModelState.AddModelError(string.Empty, "Unable to save changes. Try again, and if the problem persists contact your system administrator.");
    }
    return View(group);
}

目前，上面的代码可以正常工作，但我不确定在异常中编写.Reload()&方法是一种好习惯还是被认为是一种不好的编程习惯？.Clear()

谢谢！