using System;

using System.Collections.Generic;

using System.Diagnostics;

using System.Runtime.InteropServices;

​

public class Program

{

    public static void Main()

    {

        Guid id = Guid.NewGuid();

        string idStr = id.ToString();

        List<string> strings = new();

        List<Guid> guids = new();

        for(int i = 0; i < 10000; i++) { 

            var guid = Guid.NewGuid();

            strings.Add(guid.ToString());

            guids.Add(guid);

        }

        guids.Add(id);

        strings.Add(idStr);

        Stopwatch sw = new();

        sw.Start();

        guids.Find(x => x == id);

        sw.Stop();

        Console.WriteLine(sw.Elapsed);

        sw = new();

        sw.Start();

        strings.Find(x => x == idStr);

        sw.Stop();

        Console.WriteLine(sw.Elapsed);

    }

}