linq to object in csharp

LINQ to Objects is a set of extension methods in the System.Linq namespace of C# that provides a powerful and easy way to query data collections. Here is an example of how to use LINQ to Objects to query a list of integers:


main.cs
using System;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static void Main(string[] args)
    {
        List<int> numbers = new List<int> { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };

        // Query the list to get even numbers
        var evenNumbers = from n in numbers
                          where n % 2 == 0
                          select n;

        // Alternatively, you can compress the query syntax into method syntax
        // var evenNumbers = numbers.Where(n => n % 2 == 0);

        // Print the even numbers
        foreach (var num in evenNumbers)
        {
            Console.WriteLine(num);
        }
    }
}
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In this example, we create a list of integers and query it to get the even numbers using LINQ. The where clause filters out the odd numbers, and select projects the result to a sequence of even numbers. The result is an IEnumerable<int> that can be iterated over or converted to other data types. Note that you can also use method syntax to achieve the same result, as shown in the commented line.

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