/// <summary>
/// Checks our list of timespans and returns the
/// most recently expired timespan
/// Removes any expired timespans
/// </summary>
/// <param name="ts"></param>
/// <returns></returns>
public TimeSpan?CheckExpiredTimeSpan()
{
TimeSpan?mostRecentlyExpired = null;
// sort our timespans
// (probably doesn't matter)
ReminderTimeSpanTicks.Sort();
List <TimeSpan> toRemove = new List <TimeSpan>();
// loop through
foreach (TimeSpan ts in ReminderTimeSpans)
{
// work with expired
if (IsTimeSpanExpired(ts))
{
// find the most expired one
if (mostRecentlyExpired.HasValue)
{
mostRecentlyExpired = GetMoreRecentlyExpired(mostRecentlyExpired.Value, ts);
}
else
{
mostRecentlyExpired = ts;
}
// remove expired
toRemove.Add(ts);
}
}
// remove our timespans that expired
foreach (TimeSpan ts in toRemove)
{
ReminderTimeSpanTicks.Remove(ts.Ticks);
}
return(mostRecentlyExpired);
}