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

Answer 1

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 2

Using Distinct() function:

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

Answer 3

You could use the .Distinct() extension method.

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

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.