Removes the item at the specified index of the collection or view.
public void RemoveAt(
The zero-based index of the item to remove.
The ItemCollection is read-only because it is in ItemsSource mode or if DeferRefresh is in effect.
The index is out of range.
When an item is removed from the collection, any remaining items with higher index values decrement their index by one as the size of the collection collapses.
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)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.