How to add a dll to gac in vista

When I drag & drop a dll to the assembly folder on vista, I get the error "Access is denied: mydll.dll". How can I bypass the error message and add my dll to gac?

Where is GAC DLL?

It is located in %windir%\assembly (for example, C:\WINDOWS\assembly) and it is a shared repository of libraries.

Which command is used to add the assembly to GAC?

You can use the . NET Global Assembly Cache utility (gacutil.exe) to add assemblies to the global assembly cache and to view the contents of the global assembly cache.

My guess would be that you have to do it as an administrator...try either disabling UAC, or using gacutil.exe to add your assembly.