huysentruitw

using System;
using System.Threading;

namespace NFApp1
{
    public class Program
    {
        public static void Main()
        {
            Console.WriteLine("Hello world!");

huysentruitw

  class Program
  {
      static ConcurrentDictionary<string, string> dict = new ConcurrentDictionary<string, string>();

      static void Main(string[] args)
      {
          var t1 = new Thread(() =>
          {
              dict.GetOrAdd("key1", x =>
                  {