CTGP7.CTGP7CourseList.DownloadFromInternet C# (CSharp) Method

        public static bool DownloadFromInternet(bool isCorrupted)
        {
            bool fileExists = File.Exists(Application.StartupPath + @"\Plugins\CTGP-7CourseNames.xml");
            DialogResult res;
            if (!isCorrupted)
            {
                res = MessageBox.Show("Download the most recent CTGP-7 course names?", "CTGP-7 Course Names", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
            } else
            {
                res = MessageBox.Show("The CTGP-7 course names file doesn't exist or is corrupted.\nDownload the most recent version?", "CTGP-7 Course Names", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
            }
            if (res == DialogResult.Yes)
            {
                if (fileExists) File.Delete(Application.StartupPath + @"\Plugins\CTGP-7CourseNames.xml");
            }
            else return false;
            System.Net.WebClient webClient = new System.Net.WebClient();
            try
            {
                webClient.DownloadFile("https://raw.githubusercontent.com/mariohackandglitch/CTGP7EFEPlugin/master/CTGP-7CourseNames.xml", Application.StartupPath + @"\Plugins\CTGP-7CourseNames.xml");
            } catch (Exception e)
            {
                MessageBox.Show("Failed to download data:\n\n" + e.Message, "CTGP-7 Course Names", MessageBoxButtons.OK, MessageBoxIcon.Error);
                return false;
            }
            MessageBox.Show("Data downloaded successfully!" + (isCorrupted ? "" : "\nPlease restart application for changes to take effect."), "CTGP-7 Course Names", MessageBoxButtons.OK, MessageBoxIcon.Information);
            return true;
        }