The easiest way to get a new list would be:
List<long> unique = longs.Distinct().ToList();
Is that good enough for you, or do you need to mutate the existing list? The latter is significantly more long-winded.
Note that Distinct()
isn't guaranteed to preserve the original order, but in the current implementation it will - and that's the most natural implementation. See my Edulinq blog post about Distinct()
for more information.
If you don't need it to be a List<long>
, you could just keep it as:
IEnumerable<long> unique = longs.Distinct();
At this point it will go through the de-duping each time you iterate over unique
though. Whether that's good or not will depend on your requirements.
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