Indicates whether a part with a given URI is in the package.
Assembly: WindowsBase (in WindowsBase.dll)
The partUri should begin with a forward-slash character "/" and be absolute from the root of the package.
For additional information, see the Open Packaging Conventions (OPC) specification available for download at http://go.microsoft.com/fwlink/?LinkID=71255.
Windows 7, Windows Vista SP1 or later, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later)