Installing an assembly to the GAC seems insanely difficult to do properly. There are many pages on SO describing how to do so. I picked one that said to add the file as a component to an MSI installer in InstallShield and set the destination to GlobalAssemblyCache. When I do this, I get an error nobody else seems to be encountering yet, so maybe it's new with InstallShield 2015:Installing an assembly to the GAC seems insanel