public async Task <IActionResult> OnPostAsync(int?id)
        {
            if (id == null)
            {
                return(NotFound());
            }

            Series = await _context.Series.Include(s => s.Messages).FirstOrDefaultAsync(s => s.Id == id);

            if (Series != null)
            {
                foreach (var message in Series.Messages)
                {
                    if (message != null)
                    {
                        message.SeriesId = null;
                        _context.Message.Update(message);
                    }
                }

                _context.Series.Remove(Series);
                await _context.SaveChangesAsync();

                _logger.LogCritical($"User '{User.Identity.Name}' deleted '{Series.ToString()}'.");
            }

            return(RedirectToPage("./Index"));
        }
        public async Task <IActionResult> OnGetAsync(int?id)
        {
            if (id == null)
            {
                return(NotFound());
            }

            Series = await _context.Series
                     .Include(s => s.Messages).FirstOrDefaultAsync(s => s.Id == id);

            if (Series == null)
            {
                return(NotFound());
            }
            return(Page());
        }