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

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Closed 13 years ago.

Possible Duplicate:
Remove duplicates from array

How to get distinct values from an array in C#

• Ivan Crojach Karačić: .Distinct()? Questions with nothing in it deserve nothing more as an answer...
• DbxD: int[] MyArray = { 0, 0, 1, 2, 3, 3, 4}; int[] MyDistinctArray = MyArray.Distinct().ToArray(); Will give you MyDistinctArray = { 0, 1, 2, 3, 4}

Answer 1

You could use the .Distinct() extension method.

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

Answer 2

Using Distinct() function:

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

• dlchambers: Your dinstincts are correct :)

Answer 3

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
 */

Answer 4

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.