Assembly: System.Web (in System.Web.dll)
This property is used by the Web Parts control set, and in most development situations it is not intended to be called from your code. For this reason, although the property is public, it is hidden from IntelliSense. Developers who want to access the collection of WebPart or other server controls managed by the WebPartManager control should use its WebParts property.
Available since 2.0