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C# / .NET - check if List contains value

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Created by:

Kelly

394

In this article, we would like to show you how to check if List contains value in C#.

Quick solution:

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List<int> list = new List<int> { 1, 2, 3 };
​
bool result = list.Contains(1);
​
Console.WriteLine(result); // True

Practical example

Edit

In this example, we use Contains() method to check if Lists contain specified items.

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using System;
using System.Collections;
using System.Collections.Generic;
​
public class Program
{
    public static void Main()
    {
        List<int> numbers = new List<int> { 1, 2, 3 };
        List<string> letters = new List<string> { "A", "B", "C" };
​
        Console.WriteLine(numbers.Contains(1)); // True
        Console.WriteLine(numbers.Contains(5)); // False
​
        Console.WriteLine(letters.Contains("A")); // True
        Console.WriteLine(letters.Contains("X")); // False
    }
}