Remove all value duplicates in array

Question

example array:

int[] s new = {1,2,3,1};

if use:

int[] inew = snew.Distinct().ToArray();

then out put:

{1,2,3}

but I want out put:

{2,3}

Answer 1

You need to select everything where duplicate count is == 1:

snew.GroupBy(x => x)
 .Where(x => x.Count() == 1)
 .Select(x => x.First())
 .ToArray();

Fiddle here

• Thomas Weller: Ahh, slowly you're coming to a solution... FGITW, hmm?
• Artem: Group is much cleaner than your initial answer :)
• maccettura: @ThomasWeller yeah sorry, I was going by memory then slowly changing my answer every time I realized my mistakes haha. Then I just went on dotnetfiddle and figured out the right syntax.