I have a ListView and I edited its ItemContainerStyle to modify some style but I don\'t know how to remove that annoying animation when you add an item
This will work --
listView.ItemContainerTransitions = null;
You have to assign a new reference (or null) to the ItemContainerTransitions property. Changing the values in the collection already referenced by this property will not work.
This will NOT work --
listView.ItemContainerTransitions.Clear();