using System;

using System.Threading.Tasks;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var tPass1 = Task.FromResult(1);

        var tFail1 = Task.FromException<int>(new ArgumentException("fail1"));

        var tFail2 = Task.FromException<int>(new ArgumentException("fail2"));

        var all = new Task<int>[] { tPass1, tFail1, tFail2 }.Where(t => t.Status == TaskStatus.RanToCompletion);

        var task = Task.WhenAll(all);

        task.Wait();

    }

}