Gets an IDictionary that associates custom data with this class instance.
Assembly: System.Workflow.ComponentModel (in System.Workflow.ComponentModel.dll)
This property is a metaproperty, which means it is immutable at run time. Metaproperties do not change after a property instance is created at run time, so the property must be set to a literal value at design time.
This property is not used in the default Activity declaration implementations provided by Windows Workflow Foundation. This collection is not serialized; data that the collection contains is not persisted from design time to run time.