LINQ to SQL concurrency conflict - Looks like a clean attach with proper row versioning?

Try loading the original object in behind the new version else { _db.GetTable(). Attach(c, true); _db. Refresh(RefreshMode.

KeepCurrentValues, c); } I've learned this technique from this article in the section: concurrency patterns for Update (and Delete) operations.

Try loading the original object in behind the new version. Else { _db.GetTable(). Attach(c, true); _db.

Refresh(RefreshMode. KeepCurrentValues, c); } I've learned this technique from this article, in the section: concurrency patterns for Update (and Delete) operations.

Thanks a million. That illuminated something I was missing about reattaching an object to the DataContext: the properties of the attached object that weren't explicitly set for the save operation are empty, which the update tries to save over the currently saved values... Doh! Not what I wanted.

– I Have the Hat Oct 22 '08 at 18:01.

I am trying to get LINQ to SQL to persist changes to an attached object wherein the backing table has a DateTime column that I think should function for row versioning, as described here. ContinueOnConflict) still throws a ChangeConflict exception (as does _db.SubmitChanges()). I can't see how the attached object might could be originating from the current DataContext, as it's instanciated on its own and not retrieved from the DataContext before attaching.

Any help would be greatly appreciated.

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