C# collections performance differences...

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Diagnostics;

namespace Benchmarking
{
    static class Collections
    {
        public static void run()
        {
            Random rand = new Random();
            Stopwatch sw = new Stopwatch();
            Stack<int> stack = new Stack<int>();
            Queue<int> queue = new Queue<int>();
            List<int> list1 = new List<int>();
            List<int> list2 = new List<int>();
            LinkedList<int> linkedlist1 = new LinkedList<int>();
            LinkedList<int> linkedlist2 = new LinkedList<int>();
            int dummy;


            sw.Reset();
            Console.Write("{0,40}", "Pushing to Stack...");
            sw.Start();
            for (int i = 0; i < 100000; i++)
            {
                stack.Push(rand.Next());
            }
            sw.Stop();
            Console.WriteLine("  Time used: {0,9} ticks", sw.ElapsedTicks);
            sw.Reset();
            Console.Write("{0,40}", "Poping from Stack...");
            sw.Start();
            for (int i = 0; i < 100000; i++)
            {
                dummy = stack.Pop();
                dummy++;
            }
            sw.Stop();
            Console.WriteLine("  Time used: {0,9} ticks\n", sw.ElapsedTicks);


            sw.Reset();
            Console.Write("{0,40}", "Enqueue to Queue...");
            sw.Start();
            for (int i = 0; i < 100000; i++)
            {
                queue.Enqueue(rand.Next());
            }
            sw.Stop();
            Console.WriteLine("  Time used: {0,9} ticks", sw.ElapsedTicks);
            sw.Reset();
            Console.Write("{0,40}", "Dequeue from Queue...");
            sw.Start();
            for (int i = 0; i < 100000; i++)
            {
                dummy = queue.Dequeue();
                dummy++;
            }
            sw.Stop();
            Console.WriteLine("  Time used: {0,9} ticks\n", sw.ElapsedTicks);


            sw.Reset();
            Console.Write("{0,40}", "Insert to List at the front...");
            sw.Start();
            for (int i = 0; i < 100000; i++)
            {
                list1.Insert(0, rand.Next());
            }
            sw.Stop();
            Console.WriteLine("  Time used: {0,9} ticks", sw.ElapsedTicks);
            sw.Reset();
            Console.Write("{0,40}", "RemoveAt from List at the front...");
            sw.Start();
            for (int i = 0; i < 100000; i++)
            {
                dummy = list1[0];
                list1.RemoveAt(0);
                dummy++;
            }
            sw.Stop();
            Console.WriteLine("  Time used: {0,9} ticks\n", sw.ElapsedTicks);


            sw.Reset();
            Console.Write("{0,40}", "Add to List at the end...");
            sw.Start();
            for (int i = 0; i < 100000; i++)
            {
                list2.Add(rand.Next());
            }
            sw.Stop();
            Console.WriteLine("  Time used: {0,9} ticks", sw.ElapsedTicks);
            sw.Reset();
            Console.Write("{0,40}", "RemoveAt from List at the end...");
            sw.Start();
            for (int i = 0; i < 100000; i++)
            {
                dummy = list2[list2.Count - 1];
                list2.RemoveAt(list2.Count - 1);
                dummy++;
            }
            sw.Stop();
            Console.WriteLine("  Time used: {0,9} ticks\n", sw.ElapsedTicks);


            sw.Reset();
            Console.Write("{0,40}", "AddFirst to LinkedList...");
            sw.Start();
            for (int i = 0; i < 100000; i++)
            {
                linkedlist1.AddFirst(rand.Next());
            }
            sw.Stop();
            Console.WriteLine("  Time used: {0,9} ticks", sw.ElapsedTicks);
            sw.Reset();
            Console.Write("{0,40}", "RemoveFirst from LinkedList...");
            sw.Start();
            for (int i = 0; i < 100000; i++)
            {
                dummy = linkedlist1.First();
                linkedlist1.RemoveFirst();
                dummy++;
            }
            sw.Stop();
            Console.WriteLine("  Time used: {0,9} ticks\n", sw.ElapsedTicks);


            sw.Reset();
            Console.Write("{0,40}", "AddLast to LinkedList...");
            sw.Start();
            for (int i = 0; i < 100000; i++)
            {
                linkedlist2.AddLast(rand.Next());
            }
            sw.Stop();
            Console.WriteLine("  Time used: {0,9} ticks", sw.ElapsedTicks);
            sw.Reset();
            Console.Write("{0,40}", "RemoveLast from LinkedList...");
            sw.Start();
            for (int i = 0; i < 100000; i++)
            {
                dummy = linkedlist2.Last();
                linkedlist2.RemoveLast();
                dummy++;
            }
            sw.Stop();
            Console.WriteLine("  Time used: {0,9} ticks\n", sw.ElapsedTicks);
        }
    }
}