How to get distinct values from an array in C#?

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Remove duplicates from array

How to get distinct values from an array in C#

.Distinct()? Questions with nothing in it deserve nothing more as an answer... — Ivan Crojach Karačić, Jan 11 '12 at 08:06
int[] MyArray = { 0, 0, 1, 2, 3, 3, 4}; int[] MyDistinctArray = MyArray.Distinct().ToArray(); Will give you MyDistinctArray = { 0, 1, 2, 3, 4} — Amila, Jun 22 '15 at 04:34

score 29 · Answer 1 · answered Jan 11 '12 at 08:05

29

You could use the .Distinct() extension method.

var collectionWithDistinctElements = oldArray.Distinct().ToArray();

answered Jan 11 '12 at 08:05

Darin Dimitrov

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score 8 · Answer 2 · edited Nov 28 '16 at 09:54

8

Using Distinct() function:

var distinctArray = myArray.Distinct().ToArray();

edited Nov 28 '16 at 09:54

coder3521

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answered Jan 11 '12 at 08:05

Samich

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1

Your dinstincts are correct :) – dlchambers Aug 25 '16 at 18:30

score 6 · Answer 3 · answered Jan 11 '12 at 08:09

Use the Distinct method in LINQ.

See http://msdn.microsoft.com/en-us/library/bb348436.aspx

            List<int> ages = new List<int> { 21, 46, 46, 55, 17, 21, 55, 55 };

            IEnumerable<int> distinctAges = ages.Distinct();

            Console.WriteLine("Distinct ages:");

            foreach (int age in distinctAges)
            {
                Console.WriteLine(age);
            }

            /*
             This code produces the following output:

             Distinct ages:
             21
             46
             55
             17
            */

score 2 · Answer 4 · answered Jan 11 '12 at 08:18

2

Distinct should suffice your problem, but if you are doing this on custom object you will need to implement IEquatable<T> and will need to override GetHashCode() method to make it work.

answered Jan 11 '12 at 08:18

Amar Palsapure

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How to get distinct values from an array in C#?

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