I am working with asp.net mvc 3 and having trouble with the use of tryUpdateModel while posting changes.

I have a model that contains multiple lists of items and my view can add or remove items by Ajax and I am able to save changes with a save button.

When I add items to the collections, TryUpdateModel works just fine, but when I remove ALL items in a collection, this collection is not posted in form values anymore and TryUpdateModel does nothing instead of clearing my collection.

how can I handle this scenario ? Has somebody found a workaround to this ? Do I have to override the DefaultModelBinder ?

Thanks