GAC - adicionar e remover Assembly

Utilizando C# e Framework 3.5

Adicionando e removendo um assembly do GAC:

  internal static class GAC

    {

        /// <summary>

        /// Add strong-named assembly to GAC. DLL must be in current directory.

        /// </summary>

        /// <param name="assemblyName">name of assembly (without .dll extension).</param>

        internal void Register ( String assemblyName )

        {

            ProcessStartInfo processStartInfo = new ProcessStartInfo("gacutil.exe", string.Format("/i {0}.dll", assemblyName));

            processStartInfo.UseShellExecute = false;

            Process process = Process.Start(processStartInfo);

            process.WaitForExit;

        }

        /// <summary>

        /// Remove assembly from GAC.

        /// </summary>

        /// <param name="assemblyName">name of assembly (without .dll extension).</param>

        internal void Unregister ( String assemblyName )

        {

            ProcessStartInfo processStartInfo = new ProcessStartInfo("gacutil.exe", string.Format("/u {0}.dll",             assemblyName));

            processStartInfo.UseShellExecute = false;

            Process process = Process.Start(processStartInfo);

            process.WaitForExit;

        }

    }

Obs: GACUTIL deve ter permissão de administrador.

Fonte: http://social.msdn.microsoft.com/Forums/en-US/csharpgeneral/thread/7d3165cf-ca3b-43cc-8f77-a46dbf38f13d/#a34173da-e511-4e56-a452-11afd827269c