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Remove duplicates from a List in C#
Use the Distinct() method to remove duplicates from a list in C#.
Firstly, add a new list −
List<int> arr1 = new List<int>(); arr1.Add(10); arr1.Add(20); arr1.Add(30); arr1.Add(40); arr1.Add(50); arr1.Add(30); arr1.Add(40); arr1.Add(50);
To remove duplicate elements, use the Distinct() method as shown below −
List<int> distinct = arr1.Distinct().ToList();
Here is the complete code −
Example
using System;
using System.Collections.Generic;
using System.Linq;
public class Demo {
public static void Main() {
List<int> arr1 = new List<int>();
arr1.Add(10);
arr1.Add(20);
arr1.Add(30);
arr1.Add(40);
arr1.Add(50);
arr1.Add(30);
arr1.Add(40);
arr1.Add(50);
Console.WriteLine("Initial List ...");
foreach (int i in arr1) {
Console.WriteLine(i);
}
// Removing duplicate elements
List<int> distinct = arr1.Distinct().ToList();
Console.WriteLine("List after removing duplicate elements ...");
foreach (int res in distinct) {
Console.WriteLine("{0}", res);
}
}
}Output
Initial List ... 10 20 30 40 50 30 40 50 List after removing duplicate elements ... 10 20 30 40 50
Updated on: 22-Jun-2020
5K+ Views
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