c# linq unique by property

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c# linq unique by property -

List&lt;Person&gt; distinctPeople = allPeople
   .GroupBy(p =&gt; p.PersonId)
   .Select(g =&gt; g.FirstOrDefault())
   .ToList();

c# linq unique by property -

Persons.ToLookup(p =&gt; p.Id).Select(coll =&gt; coll.First());

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c# linq unique by property

c# linq unique by property -

c# linq unique by property -

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