public IEnumerable <TimeStatisticItem> GetStatisticsPerMinute(IEnumerable <Message> latestMessages, TimeRange expectedTimeRange)
{
var result = new List <TimeStatisticItem>();
expectedTimeRange.ForeachMinute((i, minute) =>
{
var sum = latestMessages.Where(x => x.SentAt.Date == minute.Date && x.SentAt.Hour == minute.Hour && x.SentAt.Minute == minute.Minute).Count();
var item = new TimeStatisticItem(TimeRange.Create(minute, minute.AddMinutes(1).AddSeconds(-1)), sum);
result.Add(item);
});
return(result);
}