For loop goes out of range

Question

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

namespace ConsoleApplication1
{
    class Program
    {
        sta         


        

Answer 1

Using foreach does not throw:

foreach (var i in arr)
{
  Task.Factory.StartNew(() => WorkerMethod(i));
}

But is doesn't work either:

101
101

It executes WorkerMethod with the last entry in the array. Why is nicely explained in the other answers.

This does work:

Parallel.ForEach(arr, 
                 item => Task.Factory.StartNew(() => WorkerMethod(item))
                 );

Note

This actually is my first hands-on experience with System.Threading.Tasks. I found this question, my naive answer and especially some of the other answers useful for my personal learning experience. I'll leave my answer up here because it might be useful for others.