| Overload | Description | 
|---|---|
| Add(Object) | Adds an element to the collection and returns its index. | 
| Add(Object,Boolean) | Adds an element to the collection and returns its index. | 
Target Platforms: Windows 2000 Professional (SP4), Windows 2000 Server, Windows 2003 Server (SP1), Windows 2008, Windows XP (SP2), Windows Vista, Windows 7, Windows 8