public async Task <IActionResult> Index([FromQuery] int a = 2, [FromQuery] int b = 3) { await _aggregateService.SetBaseAsync(a); var aggregateResult = await _aggregateService.AggregateAsync(b); ViewData["addFormat"] = _configuration["addFormat"] ?? "{0} + {1} = {2}"; ViewData["mulFormat"] = _configuration["mulFormat"] ?? "{0} * {1} = {2}"; _logger.LogError(_configuration["addFormat"]); _logger.LogError(_configuration["mulFormat"]); return(View(aggregateResult)); }