System.GAC.AssemblyCache.GetGACPath C# (CSharp) Method

        public static String GetGACPath()
        {
            uint bufferSize = 255;
            StringBuilder buffer = new StringBuilder((int) bufferSize);
            AssemblyCache.GetCachePath(ASM_CACHE_FLAGS.ASM_CACHE_GAC, buffer, ref bufferSize);
            return buffer.ToString();
        }