Called when the associated control changes.
Assembly: System.Design (in System.Design.dll)
The method is called when a property on the associated control is changed. It allows the implementer to do any processing that might be required after a property change. Calling the method causes the design host to call the GetDesignTimeHtml method. The base implementation of the method also persists the control in the page markup.Notes to Inheritors
Override the method to provide additional processing before persisting the control and before refreshing the design-time HTML markup.
When overriding the method in a derived class, make sure that you call the method for the base class so that registered delegates receive the event.