PackagePart.RelationshipExists Method (String)
Returns a value that indicates whether this part owns a relationship with a specified Id.
Assembly: WindowsBase (in WindowsBase.dll)
id must be a valid XML identifier. The id type is xsd:ID and must follow the naming conventions prescribed in the XML Schema Part 2: Datatypes specification (see http://www.w3.org/TR/xmlschema-2/#ID).
Available since 3.0