using System;

using System.Linq;

using System.Threading.Tasks;

​

public class Program

{

    public static void Main()

    {

        var tasks = Enumerable.Range(0, 100).Select(async x => {await Task.Delay(0); Console.WriteLine(x); return x;}).ToList(); 

        //tasks.ForEach(x=> Console.WriteLine(x.IsCompleted));

        Console.WriteLine("Done");;

        Task.WaitAll(tasks.ToArray());

    }

}