Visual Studio 2015
Occurs whenever an add-in is loaded or unloaded from the Visual Studio integrated development environment (IDE).
Assembly: Extensibility (in Extensibility.dll)
Add-ins are deprecated. For more information, see FAQ: Converting Add-ins to VSPackage Extensions.
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.