public async Task <IActionResult> EditActivity(int?id) { if (id == null) { return(NotFound()); } var activity = await _dataContext.Activities .Include(r => r.Referee) .Include(r => r.ActivityType) .FirstOrDefaultAsync(p => p.Id == id); if (activity == null) { return(NotFound()); } var model = _converterHelper.ToActivityViewModel(activity); return(View(model)); }