Removes the item at the specified position from the collection.
Assembly: PresentationFramework (in PresentationFramework.dll)
index is less than 0 or greater than the number of items in the collection view.
index is relative to the collection view, not the collection. For example, if the collection has 10 items and the view has a Filter so that 7 items appear, the valid values of index are 0 through 6.