LINQ's Distinct() on a particular property

Question

I am playing with LINQ to learn about it, but I can\'t figure out how to use Distinct when I do not have a simple list (a simple list of integers is pretty easy

Answer 1

Solution first group by your fields then select firstordefault item.

    List distinctPeople = allPeople
   .GroupBy(p => p.PersonId)
   .Select(g => g.FirstOrDefault())
   .ToList();