HpToolsLauncher.Helper.GetRootDirectoryPath C# (CSharp) Method

        public static string GetRootDirectoryPath()
        {
            String directoryPath;
            RegistryKey regkey = Registry.LocalMachine.OpenSubKey(FT_REG_ROOT);

            if (regkey != null)
                directoryPath = (string) regkey.GetValue(FT_ROOT_PATH_KEY);
            else
            {
            //TRY 64 bit REG path
                regkey = Registry.LocalMachine.OpenSubKey(FT_REG_ROOT_64_BIT);
                if (regkey != null)
                    directoryPath = (string) regkey.GetValue(FT_ROOT_PATH_KEY);
                else
                    directoryPath = GetRootFromEnvironment();
            }

            return directoryPath;
        }