IManagedAddin::Unload
Applies to: 
Visual Studio 
Visual Studio for Mac
Note
This article applies to Visual Studio 2017. If you're looking for the latest Visual Studio documentation, see Visual Studio documentation. We recommend upgrading to the latest version of Visual Studio. Download it here
Called just before a managed VSTO Add-in is unloaded.
Syntax
HRESULT Unload();
Return value
An HRESULT value that indicates whether the method completed successfully.
Remarks
This method is not called by current versions of Microsoft Office. This method is reserved for future use.