This dialog box allows selecting an assembly from those stored in the Global Assembly Collection on your computer or to select an assembly that is stored elsewhere. Assemblies from the Global Assembly Collection are found and listed in the dialog box automatically.
GAC
This tab lists all the assemblies present in the GAC (Global Assembly Collection).
Browse
This tab allows specifying the path to an assembly that is stored in a location other than the Global Assembly Collection.
File Name
Allows entering the path to an assembly that is stored outside the Global Assembly Collection.
Browse
Allows navigating to an assembly that is stored outside the Global Assembly Collection.