| Overload | Description |
|---|---|
| Add(ThumbnailItem) | This method adds the provided ThumbnailItem to the end of the collection. The display is updated if appropriate. This method throws an exception if item is not a directory and item.Filename specifies an invalid, unsupported, or non-existent file. |
| Add(ThumbnailItem,Boolean) | This method adds the provided ThumbnailItem to the end of the collection. The display is updated if appropriate. This method throws an exception if item is not a directory and item.Filename specifies an invalid, unsupported, or non-existent file. |