AnimeDownloader.MainForm.SaveSettings C# (CSharp) Method

        public void SaveSettings()
        {
            Properties.Settings.Default.ADSettings = ADBaseLibrary.Settings.Instance.Serialize();
            Properties.Settings.Default.Save();
            _manager.MaxDownloads=Settings.Instance.SimultaneousDownloads;

        }
        private async void butCheckSettings_Click(object sender, EventArgs e)