C# program to remove duplicate elements from a List

Declare a list and add elements.

List<int> list = new List<int>();
list.Add(50);
list.Add(90);
list.Add(50);
list.Add(100);

Now, use Distinct() method to get the unique elements only.

List<int> myList = list.Distinct().ToList();

The following is the complete code to remove duplicate elements from a List −

Example

 Live Demo

using System;
using System.Collections.Generic;
using System.Linq;

public class Demo {
   public static void Main() {
      List < int > list = new List < int > ();
      list.Add(50);
      list.Add(90);
      list.Add(50);
      list.Add(100);

      Console.WriteLine("Initial List...");
      foreach(int a in list) {
         Console.WriteLine("{0}", a);
      }

      List < int > myList = list.Distinct().ToList();
      Console.WriteLine("New List after removing duplicate elements...");
      foreach(int a in myList) {
         Console.WriteLine("{0}", a);
      }
   }
}

Output

Initial List...
50
90
50
100
New List after removing duplicate elements...
50
90
100