Fastest way to Remove Duplicate Value from a list<> by lambda

Question

what is fastest way to remove duplicate values from a list. Assume List longs = new List { 1, 2, 3, 4, 3, 2, 5 }; So I am interesting in

Answer 1

There is Distinct() method. it should works.

List longs = new List { 1, 2, 3, 4, 3, 2, 5 };
var distinctList = longs.Distinct().ToList();