Parallel.For and async

output.txt

Starting
Starting 0
Starting 4
Starting 3
Starting 8
Starting 7
Starting 6
Starting 2
Starting 1
Starting 5
Starting 9
Ending
Press any key to continue . . .

Program.cs

using System;
using System.Threading.Tasks;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Starting");

            Parallel.For(0, 10, async (i) =>
            {
                Console.WriteLine("Starting " + i);
                await Task.Delay(TimeSpan.FromSeconds(10));
                Console.WriteLine("Ending " + i);
            });

            Console.WriteLine("Ending");
        }
    }
}