Calling AddNew starts an add transaction. You should call CommitNew or CancelNew to end the add transaction. A new item always appears in the collection view. Any filtering, sorting, or grouping that is applied to the view is applied to the new item when CommitNew is called.
Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)