Do you believe that you can update the items in the collection using a single line of code?
Yes, it’s possible using the LINQ. There are several ways to update the items in the collection like using a foreach loop like below. but the problem here is that it’ll iterate through all items in the collection. Even you want to update only specific items.

foreach(Company company in companies.ToList())
		{
			if(company.Name=="Google")
			{
				company.Name="facebook";
			}
		}

BUT, The LINQ made it possible by changing a single line code which is much easier and simple.

companies.Where(x => x.Name.Equals("Google")).ToList().ForEach(i => i.Name = "Facebook");

Full Program:

using System;
using System.Collections.Generic;
using System.Linq;
					
public class Program
{
	public class Company
	{
		public int Id { get; set;}
		public string Name { get; set;}
	}
	
	public static void Main()
	{
		var companies = new List();
		companies.Add( new Company() { Id=1, Name="Google" });
		companies.Add( new Company() { Id=2, Name="Microsoft" });
		companies.Add( new Company() { Id=3, Name="Apple" });
		companies.Add( new Company() { Id=4, Name="Amazon" });

		foreach(Company company in companies.ToList())
		{
			Console.WriteLine(company.Name);
		}
		
		companies.Where(x => x.Name.Equals("Google")).ToList().ForEach(i => i.Name = "Facebook");
		
		foreach(Company company in companies.ToList())
		{
			Console.WriteLine("Target company is {0}", company.Name);
		}
	}
}

Output:

Google
Microsoft
Apple
Amazon
Target company is Facebook
Target company is Microsoft
Target company is Apple
Target company is Amazon

I hope This will help you write better code!