ActivityDesigner.OnActivityChanged Method (ActivityChangedEventArgs)
Notifies the ActivityDesigner when the activity it is associated with changes.
Assembly: System.Workflow.ComponentModel (in System.Workflow.ComponentModel.dll)
e contains data about what changes were made to the Activity. You can use this method to update the designer state and the UI displayed on the workflow designer when a user makes changes to an activity at design time.
Available since 3.0