Called when attributes are needed for a type.
Assembly: System.Activities.Presentation (in System.Activities.Presentation.dll)
This callback enables delayed registration of metadata attributes as well as the ability to provide code that dynamically determines which attributes should be applied. This callback is provided to the AddCallback method of the AttributeTableBuilder class.
AttributeCallbackBuilder objects can build attributes only for the type that is requesting metadata.
Available since 4.0