BiliRanking.WPF.View.VideoClip.buttonMarkStartN_Click C# (CSharp) Метод

        private void buttonMarkStartN_Click(object sender, RoutedEventArgs e)
        {
            Button btn = (Button)sender;
            markStart = Player.Time + new TimeSpan(0, 0, Convert.ToInt32(((string)btn.Content).Substring(0, ((string)btn.Content).Length - 1)));
            //markStart = Player.Time - new TimeSpan(0, 0, diyProp.GetTimeChange((diyProp)sender));
            FreshTime();
        }