HpToolsLauncher.Helper.GetRootFromEnvironment C# (CSharp) Method

        private static string GetRootFromEnvironment()
        {
            string qtpRoot = Environment.GetEnvironmentVariable(QTP_ROOT_ENV_VAR_NAME, EnvironmentVariableTarget.Process);

            if (string.IsNullOrEmpty(qtpRoot))
            {
                qtpRoot = Environment.GetEnvironmentVariable(QTP_ROOT_ENV_VAR_NAME, EnvironmentVariableTarget.User);

                if (string.IsNullOrEmpty(qtpRoot))
                {
                    qtpRoot = Environment.GetEnvironmentVariable(QTP_ROOT_ENV_VAR_NAME,
                        EnvironmentVariableTarget.Machine);

                    if (string.IsNullOrEmpty(qtpRoot))
                    {
                        qtpRoot = Environment.CurrentDirectory;
                    }
                }
            }

            return qtpRoot;
        }