public CalDavResources (IReadOnlyList<CalendarData> calendarResources, IReadOnlyList<TaskListData> taskTaskListResources)
{
if (calendarResources == null)
throw new ArgumentNullException (nameof (calendarResources));
if (taskTaskListResources == null)
throw new ArgumentNullException (nameof (taskTaskListResources));
CalendarResources = calendarResources;
TaskListResources = taskTaskListResources;
}