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Remove duplicates from a List<T> in C#

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ayaan answered on March 14, 2021 Popularity 10/10 Helpfulness 2/10

answer Remove duplicates from a List<T> in C#

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Remove duplicates from a List<T> in C#

Comment

using System;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        HashSet<int> evenNumbers = new HashSet<int>();
        HashSet<int> oddNumbers = new HashSet<int>();

        for (int i = 0; i < 5; i++)
        {
            // Populate numbers with just even numbers.
            evenNumbers.Add(i * 2);

            // Populate oddNumbers with just odd numbers.
            oddNumbers.Add((i * 2) + 1);
        }

        Console.Write("evenNumbers contains {0} elements: ", evenNumbers.Count);
        DisplaySet(evenNumbers);

        Console.Write("oddNumbers contains {0} elements: ", oddNumbers.Count);
        DisplaySet(oddNumbers);

        // Create a new HashSet populated with even numbers.
        HashSet<int> numbers = new HashSet<int>(evenNumbers);
        Console.WriteLine("numbers UnionWith oddNumbers...");
        numbers.UnionWith(oddNumbers);

        Console.Write("numbers contains {0} elements: ", numbers.Count);
        DisplaySet(numbers);
    }

    private static void DisplaySet(HashSet<int> set)
    {
        Console.Write("{");
        foreach (int i in set)
        {
            Console.Write(" {0}", i);
        }
        Console.WriteLine(" }");
    }
}

/* This example produces output similar to the following:
 * evenNumbers contains 5 elements: { 0 2 4 6 8 }
 * oddNumbers contains 5 elements: { 1 3 5 7 9 }
 * numbers UnionWith oddNumbers...
 * numbers contains 10 elements: { 0 2 4 6 8 1 3 5 7 9 }
 */

Popularity 10/10 Helpfulness 2/10 Language csharp

Source: stackoverflow.com

Tags: c#

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Contributed on Mar 14 2021

ayaan

0 Answers Avg Quality 2/10

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c# list remove duplicate items

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List<string> lstWhitDuplicate = new list<string>();
lstWhitDuplicate.add("hallo");
lstWhitDuplicate.add("hallo");
lstWhitDuplicate.add("World");

List<string> lst = lstWhitDuplicate.Distinct().ToList(); 

// output lstWhitDuplicate:
// hallo hallo world
// output lst:
// hallo word

Popularity 10/10 Helpfulness 6/10 Language csharp

Source: Grepper

Tags: c# c

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Contributed on Aug 14 2021

mari

0 Answers Avg Quality 2/10

c# remove duplicates from list

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List<T> withDupes = LoadSomeData();
List<T> noDupes = withDupes.Distinct().ToList();

Popularity 10/10 Helpfulness 3/10 Language csharp

Source: stackoverflow.com

Tags: c# c

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Contributed on Nov 04 2021

Defeated Dog

0 Answers Avg Quality 2/10

remove duplicates from list c#

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List<int> numbers = new List<int>() { 1, 2, 3, 3, 4, 5, 5 };

List<int> uniqueNumbers = numbers.Distinct().ToList();

foreach (int num in uniqueNumbers)
{
    Console.WriteLine(num);
}

Popularity 8/10 Helpfulness 2/10 Language csharp

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Contributed on Sep 11 2023

YOU.com

0 Answers Avg Quality 2/10

c# remove duplicates from list

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List<int> numbers = new List<int>() { 1, 2, 3, 4, 4, 5, 1, 2, 6 };

List<int> uniqueNumbers = numbers.Distinct().ToList();

// uniqueNumbers will now contain [1, 2, 3, 4, 5, 6]

Popularity 8/10 Helpfulness 2/10 Language csharp

Source: Grepper

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Contributed on Sep 12 2023

YOU.com

0 Answers Avg Quality 2/10

Remove duplicates from a List<T> in C#

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Remove duplicates from a List<T> in C#

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