In LINQ, the Distinct method or operator is used to get only distinct elements from the collection or list. In another word these distinct method doesn’t accept the duplicate elements, means remove the duplicate value make its single value.

Syntax

collection1.Distinct ( collection2)

Example

using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

 public static void Main()

 {

  List<string> count1= new List<string>() { 'UK', 'Australia', 'India', 'USA', 'India', 'UAE', 'Canada', 'Uk', 'China', 'Pok' };

  // ignore the case

  //List<string> list = count1.Distinct(StringComparer.OrdinalIgnoreCase).ToList();

  List<string> list = count1.Distinct().OrderBy( str => str).ToList();

  list.ForEach( country => Console.WriteLine(country) );

  Console.ReadLine();

 }

}

Output

after using orderby() method result in ascending order

Australia

Canada

China

India

Pok

UAE

Uk

UK

USA