Comparison between Different Methods to Iterate Over a List of Items

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

namespace LoopExecution
{

    public class LoopExecution<T>
    {

        public delegate void MethodToExecute(object sender, LoopExecutionEventArgs e);
        public event MethodToExecute ExecutionMethod;

        protected void OnExecuteMethod(object sender, LoopExecutionEventArgs e)
        {
            if (ExecutionMethod != null)
            {
                ExecutionMethod(sender, e);
            }
        }

        public List<T> CollectionToIterateOver { get; set; }

        public long NormalLoopTime { get; set; }
        public long ThreadLoopTime { get; set; }
        public long ThreadPoolLoopTime { get; set; }
        public long TaskLoopTime { get; set; }
        Stopwatch watch = new Stopwatch();

        public void Execute()
        {
            NormalExecute();
            ThreadExecute();
            ThreadPoolExecute();
            TaskParallelExecute();
        }

        private void NormalExecute()
        {
            watch.Start();
            NormalWhileLoop();
            NormalLoopTime = watch.ElapsedMilliseconds;
            watch.Reset();
        }

        private void NormalWhileLoop()
        {
            for (int i = 0; i < this.CollectionToIterateOver.Count; i++)
            {
                LoopExecutionEventArgs e = new LoopExecutionEventArgs();
                StackFrame stackFrame = new StackFrame();
                e.MethodName = stackFrame.GetMethod().ToString();
                e.LoopExecutionNumber = i;
                e.ObjectToOperateOn = CollectionToIterateOver[i];

                OnExecuteMethod(this, e);
            }
        }

        private void ThreadExecute()
        {
            watch.Start();
            ThreadLoop();
            ThreadLoopTime = watch.ElapsedMilliseconds;
            watch.Reset();
        }

        private void ThreadLoop()
        {

            for (int i = 0; i < this.CollectionToIterateOver.Count; i++)
            {
                Thread t = new Thread(x =>
                {
                    LoopExecutionEventArgs e = new LoopExecutionEventArgs();
                    StackFrame stackFrame = new StackFrame();
                    e.MethodName = stackFrame.GetMethod().ToString();
                    e.LoopExecutionNumber = (int)x;
                    e.ObjectToOperateOn = CollectionToIterateOver[(int)x];
                    OnExecuteMethod(this, e);
                });
                t.Start(i);
            }
        }

        private void ThreadPoolExecute()
        {
            watch.Start();
            ThreadPoolLoop();
            ThreadPoolLoopTime = watch.ElapsedMilliseconds;
            watch.Reset();
        }
        
        private void ThreadPoolLoop()
        {
            int toProcess = this.CollectionToIterateOver.Count;
            using (ManualResetEvent resetEvent = new ManualResetEvent(false))
            {
                for (int i = 0; i < this.CollectionToIterateOver.Count; i++)
                {
                    ThreadPool.QueueUserWorkItem(new WaitCallback(x =>
                        {
                            LoopExecutionEventArgs e = new LoopExecutionEventArgs();
                            StackFrame stackFrame = new StackFrame();
                            e.MethodName = stackFrame.GetMethod().ToString();
                            e.LoopExecutionNumber = (int)x;
                            e.ObjectToOperateOn = CollectionToIterateOver[(int)x];
                            OnExecuteMethod(this, e);
                            if (Interlocked.Decrement(ref toProcess) == 0)
                                resetEvent.Set();

                        }
                                 ), i);
                }
                resetEvent.WaitOne();
            }
        }

        private void TaskParallelExecute()
        {
            watch.Start();
            TaskParallelLibraryLoop();
            TaskLoopTime = watch.ElapsedMilliseconds;
            watch.Reset();
        }

        private void TaskParallelLibraryLoop()
        {
            Parallel.For(0, this.CollectionToIterateOver.Count, i =>
                {
                    LoopExecutionEventArgs e = new LoopExecutionEventArgs();
                    StackFrame stackFrame = new StackFrame();
                    e.MethodName = stackFrame.GetMethod().ToString();
                    e.LoopExecutionNumber = i;
                    e.ObjectToOperateOn = CollectionToIterateOver[i];
                    OnExecuteMethod(this, e);
                })
            ;
        }

        public class LoopExecutionEventArgs : EventArgs
        {
            public String MethodName { get; set; }
            public T ObjectToOperateOn { get; set; }
            public int LoopExecutionNumber { get; set; }
        }

    }
}