internal bool ReplaceIfNeededWith(ICollection <T> items)
{
using (AsyncReaderWriterLock.UpgradeableReaderKey readerKey = Lock.UpgradeableReaderLock()) {
if (HashSet.SetEquals(items))
{
return(false);
}
ReplaceWith(items, readerKey);
return(true);
}
}
private void ReplaceWith(IEnumerable <T> items, AsyncReaderWriterLock.UpgradeableReaderKey readerKey)
{
using (readerKey.Upgrade()) {
HashSet.Clear();
foreach (T item in items)
{
HashSet.Add(item);
}
HashSet.TrimExcess();
}
}