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.
Windows Phone 8.1, Windows Phone 8, 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.