using System;

using System.Collections.Generic;

using System.Diagnostics;

​

    public class Program

    {

        public static List<N> list;

        public static void Main(string[] args)

        {

            list = new List<N>();

            var timer = new Stopwatch();

            timer.Start();

            for (var i = 0; i < 1000; i++)

            {

                var thisItem = new N { X = i, B = 1, C = Decimal.Parse(i.ToString()), F = float.Parse(i.ToString()), O = i, S = i.ToString() };

                list.Add(thisItem);

            }

            timer.Stop();

            Console.WriteLine(timer.Elapsed.ToString());

            Console.ReadKey();

        }

    }

​

    public class N

    {

        public int X { get; set; }

        public string S { get; set; }

        public float F { get; set; }

        public decimal C { get; set; }

        public byte B { get; set; }

        public object O { get; set; }

    }