public void RegenerateCallNumbers(int departmentId)
{
var calls = _callsRepository.GetAll().Where(x => x.DepartmentId == departmentId).OrderBy(x => x.LoggedOn);
int year = DateTime.UtcNow.Year;
int count = 1;
foreach (var call in calls)
{
call.Number = string.Format("{0}-{1}", year % 100, count);
}
_callsRepository.SaveOrUpdateAll(calls);
}