Dynamo.ViewModels.TermsOfUseHelper.ShowTermsOfUseDialog C# (CSharp) Method

        internal static bool ShowTermsOfUseDialog(bool forPublishing, string additionalTerms)
        {
            var executingAssemblyPathName = Assembly.GetExecutingAssembly().Location;
            var rootModuleDirectory = Path.GetDirectoryName(executingAssemblyPathName);
            var touFilePath = Path.Combine(rootModuleDirectory, "TermsOfUse.rtf");

            var termsOfUseView = new TermsOfUseView(touFilePath);
            termsOfUseView.ShowDialog();
            if (!termsOfUseView.AcceptedTermsOfUse)
                return false; // User rejected the terms, go no further.

            if (string.IsNullOrEmpty(additionalTerms)) // No additional terms.
                return termsOfUseView.AcceptedTermsOfUse;

            // If user has accepted the terms, and if there is an additional 
            // terms specified, then that should be shown, too. Note that if 
            // the file path is provided, it has to represent a valid file path.
            // 
            if (!File.Exists(additionalTerms))
                throw new FileNotFoundException(additionalTerms);

            var additionalTermsView = new TermsOfUseView(additionalTerms);
            additionalTermsView.ShowDialog();
            return additionalTermsView.AcceptedTermsOfUse;
        }

        /// <summary>
        /// Download and install a specific package from the package manager
        /// </summary>
        /// <param name="packageInfo"></param>
        /// <param name="downloadPath"></param>
        public void DownloadAndInstallPackage(IPackageInfo packageInfo, string downloadPath = null)
        {
            // User needs to accept terms of use before any packages can be downloaded from package manager
            var prefSettings = DynamoViewModel.Model.PreferenceSettings;
            var touAccepted  = prefSettings.PackageDownloadTouAccepted;

            if (!touAccepted)
            {
                touAccepted = TermsOfUseHelper.ShowTermsOfUseDialog(false, null);
                prefSettings.PackageDownloadTouAccepted = touAccepted;
                if (!touAccepted)
                {
                    return;
                }
            }

            // Try to get the package version for this package
            PackageVersion version;

            try
            {
                version = Model.GetPackageVersionHeader(packageInfo);
            }
            catch
            {
                MessageBox.Show(
                    string.Format(Resources.MessagePackageVersionNotFound, packageInfo.Version.ToString(), packageInfo.Name),
                    Resources.PackageDownloadErrorMessageBoxTitle,
                    MessageBoxButton.OK,
                    MessageBoxImage.Error);
                return;
            }

            ExecutePackageDownload(packageInfo.Name, version, downloadPath);
        }