 <p>You can just use Windows Explorer. Open Windows Explorer and go into the <code>assembly</code> folder inside your Windows folder. You should then see all the assemblies that are registered, if you want to add yours in, just drag and drop it in there.</p> <p>Or if you prefer, you can locate the gacutil.exe and use that to do it (but it's not installed with the framework nowdays, only with the SDK I think).</p>