HpToolsLauncher.Helper.getLRInstallPath C# (CSharp) Method

        public static string getLRInstallPath()
        {
            string installPath = null;
            System.Collections.IDictionary envVariables = Environment.GetEnvironmentVariables();

            //try to find LoadRunner install path in environment vars
            foreach (string variable in LoadRunnerENVVariables)
            {
                if (envVariables.Contains(variable))
                    return envVariables[variable] as string;
            }

            //Fallback to registry
            //try 32 bit
            RegistryKey regkey = Registry.LocalMachine.OpenSubKey(LoadRunnerRegistryKey);

            if (regkey == null)
            {
                //try 64-bit
                regkey = Registry.LocalMachine.OpenSubKey(LoadRunner64RegisryKey);

            }

            if (regkey != null)
            {

                //LoadRunner Exists. check if Controller is installed (not SA version)
                regkey = regkey.OpenSubKey(LoadRunnerControllerDirRegistryKey);
                if (regkey != null)
                    return regkey.GetValue("Controller").ToString();

            }

            return installPath;
        }

        public static Assembly HPToolsAssemblyResolver(object sender, ResolveEventArgs args)
        {
            AssemblyName asmName = new AssemblyName(args.Name);

            if (asmName == null)
            {
                return(null);
            }

            string assemblyName = asmName.Name;

            if (assemblyName.EndsWith(".resources"))
            {
                return(null);
            }

            if (assemblyName == "HpToolsLauncher.XmlSerializers")
            {
                return(null);
            }

            string installtionPath = null;

            installtionPath = Helper.getLRInstallPath();
            if (installtionPath == null)
            {
                ConsoleWriter.WriteErrLine(string.Format(Resources.LoadRunnerNotInstalled,
                                                         System.Environment.MachineName));
                Environment.Exit((int)Launcher.ExitCodeEnum.Aborted);
            }

            installtionPath = Path.Combine(installtionPath, "bin");

            Assembly ans;

            if (!File.Exists(Path.Combine(installtionPath, assemblyName + ".dll")))
            {
                //resource!
                ConsoleWriter.WriteErrLine("cannot locate " + assemblyName + ".dll in installation directory");
                Environment.Exit((int)Launcher.ExitCodeEnum.Aborted);
            }
            else
            {
                //Console.WriteLine("loading " + assemblyName + " from " + Path.Combine(installtionPath, assemblyName + ".dll"));
                ans = Assembly.LoadFrom(Path.Combine(installtionPath, assemblyName + ".dll"));

                AssemblyName loadedName = ans.GetName();
                if (loadedName.Name == "Interop.Wlrun")
                {
                    if (loadedName.Version.Major > 11 ||
                        (loadedName.Version.Major == 11 && loadedName.Version.Minor >= 52))
                    {
                        return(ans);
                    }
                    else
                    {
                        ConsoleWriter.WriteErrLine(string.Format(Resources.HPToolsAssemblyResolverWrongVersion,
                                                                 Environment.MachineName));
                        Environment.Exit((int)Launcher.ExitCodeEnum.Aborted);
                    }
                }
                else
                {
                    return(ans);
                }
            }


            return(null);
        }