List vs LINQ

Program.cs

using System.Collections.Generic;
using System.Linq;
using BenchmarkDotNet.Running;
using BenchmarkDotNet.Attributes;

namespace ListVsEnumerable
{
    [MemoryDiagnoser]
    public class ListTest
    {
        private const int Count = 100000;
        private const int Divider = 20;

        [Benchmark]
        public List<int> FilterEnumerable()
        {
            var items = Enumerable.Range(0, Count).ToList();
            return items.Where(x => x % Divider == 0).ToList();
        }

        [Benchmark]
        public List<int> FilterList()
        {
            var items = Enumerable.Range(0, Count).ToList();
            for (var i = 0; i < items.Count; i++)
            {
                if (items[i] % Divider == 0)
                {
                    items.RemoveAt(i);
                    i--;
                }
            }

            return items;
        }
    }
    
    class Program
    {
        static void Main(string[] args)
        {
            var summary = BenchmarkRunner.Run<ListTest>();
        }
    }
}