ZeroInstall.BootstrapProcess.GetExistingInstance C# (CSharp) Method

        private ProcessStartInfo GetExistingInstance()
        {
            if (!WindowsUtils.IsWindows) return null;

            string existingInstall = RegistryUtils.GetSoftwareString("Zero Install", "InstallLocation");
            if (!string.IsNullOrEmpty(existingInstall))
            {
                string launchAssembly = _gui
                    ? "0install-win" //(WindowsUtils.IsWindows ? "0install-win" : "0install-gtk")
                    : "0install";

                if (File.Exists(Path.Combine(existingInstall, launchAssembly + ".exe")))
                    return ProcessUtils.Assembly(Path.Combine(existingInstall, launchAssembly), _targetArgs.ToArray());
            }
            return null;
        }