public async Task <IEnumerable <WeatherForecast> > FetchAsync(CancellationToken cancellationToken)
{
var forecasts = new List <WeatherForecast>();
for (var index = 1; index < 5; index++)
{
var date = DateTime.Now.Date.AddDays(index);
// Get cached daily forecast if it exists and fetch if not.
var forecast = await _distributedCache
.GetOrSetJsonObjectAsync($"single-weather-forecast:{date.ToShortDateString()}",
() => _weatherService.FetchForecastAsync(date, cancellationToken),
_entryOptions,
cancellationToken);
forecasts.Add(forecast);
}
return(forecasts.AsEnumerable());
}