Assembly: Extensibility (in extensibility.dll)
An empty array that you can use to pass host-specific data for use in the add-in.
Although a shutdown of Visual Studio might be canceled, the OnBeginShutdown method cannot be canceled. As a result, add-ins should assume that all shutdown events occur and perform any cleanup routines accordingly.
This method can be used to store the settings of the add-in at the time that Visual Studio shuts down so that it can be restored later to its original state.