Creates a new package part.
Assembly: WindowsBase (in WindowsBase.dll)
For more information about package parts, see section 1.1 of the Open Packaging Conventions (OPC) specification available for download at http://go.microsoft.com/fwlink/?LinkID=71255.
Notes to Inheritors:
CreatePartCore method to actually create the part based on the physical format implemented in the derived class.internally calls the derived class