code:

    class Program
    {
        static readonly List<int> sortedNums = new List<int>();
        static void Main()
        {
            var nums = new List<int> {3,4,1,2,10,9,5,7,12,15,20,30,22,6};
            nums.ForEach(num=>new Thread(i=>
                                             {
                                                 Thread.Sleep((int)i * 50);
                                                 lock(sortedNums) sortedNums.Add((int)i);
                                             }).Start(num));
            while(sortedNums.Count<nums.Count){}
            sortedNums.ForEach(Console.WriteLine);
        }   
    }